When a highly trained spy decides to go rogue, the fallout can be explosive. Some of these men were after personal profit, others claimed they were still serving their nation in an unorthodox way. All caused serious tremors in the shadowy world of espionage.

Rogue Spies Who Went Off the Grid

10 Edwin P. Wilson

In 1955, Edwin P. Wilson was just another grunt flying home after serving in the final days of the Korean War. As the plane crossed the Pacific, he struck up a conversation with the passenger sitting beside him. When he mentioned that he was looking for work, the man suggested that he might consider a career in the CIA and gave him a phone number to call. He did not mention his own name and Wilson never saw him again. A few weeks later, Wilson was starting his new job as a CIA agent.

He served with distinction for two decades, at one point breaking into a hotel to release cockroaches into the rooms of a Soviet labor delegation. But his main specialty became setting up front corporations and maintaining the CIA’s clandestine business interests. In 1976, he officially left the CIA to enter the private sector—and that’s when things get really murky. Wilson’s new business was arms dealing and it made him a very rich man. The farmer’s son from Idaho became an international playboy, jetting between luxury homes around the world and entertaining generals and politicians at his estate in northern Virginia.

Wilson’s main client was the Libyan regime of Muammar Gadhafi, then accused of sponsoring terrorist activities in Europe and the Middle East. Wilson didn’t seem bothered, funneling millions of dollars in arms to Libya and hiring ex-Green Berets to teach Gadhafi’s spies how to make bombs disguised as lamps and radios. A pistol he personally supplied was used to murder a Libyan dissident in Switzerland, one of the few acts he later admitted feeling guilty about. Then, in 1977, he arranged to sell the Libyans 20 tons of C-4 plastic explosives—an amount almost equal to America’s entire stockpile. To obtain the explosives without too many awkward questions, he told manufacturers that he was still working for the CIA.

It was the last straw. In 1982, he was lured to the Dominican Republic, seized, and flown to America to face trial. In prison he managed to dig himself even deeper when he was recorded offering another prisoner $50,000 a head to kill the prosecutor, six witnesses, and his wife. Wilson’s defense of the arms dealing charges was simple: He claimed he had been working for the CIA the whole time. High-ranking CIA officials took the stand to testify that the agency had had no contact with him since he left, and Wilson was convicted.

Then, in 2003, Wilson’s lawyers used newly released documents to appeal his case. A Texas judge found that he had probably been acting under orders and overturned his conviction. He died, old and bitter, in 2012. Historians continue to debate exactly how much the CIA knew about his activities.

9 Jean Grombach

Jean “Frenchy” Grombach spent his life obsessed with secrecy. The son of the French consul in New Orleans, he became an American citizen at age 18, the year he enrolled at West Point. He spent a decade in the military, including the army’s G2 intelligence department, before retiring to become a radio producer. But it was during World War II that he really found his calling. At that time, US intelligence was in the hands of the flamboyant “Wild Bill” Donovan and his Office of Strategic Services (OSS). To Grombach, who had reenlisted, such a larger‑than‑life approach was anathema.

Instead, he proposed the creation of a truly clandestine secret agency. Unlike the OSS and its successor, the CIA, Grombach’s organization would be not just officially secret, but actually secret. The only people who would know of its existence were the President and a few trusted generals and advisers. Off the books, the agency could carry out operations with total deniability and minimal oversight. It didn’t even have a name, just an informal nickname, “the Pond.”

In 1942, Grombach got the go‑ahead to found his agency. Many of the Pond’s activities remain mysterious to this day, but what is known is that Grombach instantly caused friction with his odd belief that “intelligence is the gathering of data on selected subjects without regard to correctness.” Still chasing the dream of total independence, Grombach was outraged to discover that his reports were still vetted by superiors, who rejected 80 percent of them as inaccurate. He became convinced that the US government had been infiltrated by communist agents.

In 1951, disaster struck. The Pond was ordered to begin reporting to the CIA, which Grombach believed was a bastion of communist spies. His suspicions were seemingly confirmed when the CIA started rejecting most of the Pond’s intel as unreliable hearsay. In response, Grombach went rogue. He began passing sensitive information to Senator Joe McCarthy, including a list of agents he believed to be Russian moles, which McCarthy used to publicly attack the CIA.

But in the CIA, Grombach had finally met an opponent as devious as himself. They began feeding disinformation to the Pond in the hopes that Grombach would pass it on to McCarthy, who would be humiliated when it was proven false. That completed, the CIA unceremoniously pulled the plug. The Pond carried out its last operation in 1955. Grombach, thoroughly burned, failed to find further work in intelligence gathering.

8 Philip Agee

Was Philip Agee an honorable man, a dedicated whistleblower who sought to expose CIA corruption and immorality? Or was he a traitor, a ruthless stooge of the KGB who thought nothing of putting his former colleagues in harm’s way? The debate has colored all descriptions of Agee’s life, yet whatever your conclusions, the hard facts are themselves extraordinary.

Agee joined the CIA in 1957 and spent 12 years with the agency, mainly in South America. An idealistic young man, he soon grew shocked and appalled by the CIA’s morally bankrupt actions in the region—including support for right‑wing death squads. The agency’s tacit support of the 1968 massacre of student protesters in Mexico City solidified his belief that the US intelligence community had become a force for evil. When he fell in love with a Brazilian named Angela who had been tortured and imprisoned in her home country, his mind was made up. He resigned from the CIA, moved to Britain, and began a relentless campaign to reveal the inner workings of the agency.

Agee’s 1975 book, Inside the Company: CIA Diary, revealed the identities of over 250 undercover agents. Many writers have linked the revelations to the murder of US diplomat and spy Richard S. Welch, who was killed by Greek communists later that year, although others have pointed out that Welch was not actually among the agents named by Agee. Harder to explain away were his links to Cuban intelligence, who funded his early literary ventures.

Agee has always insisted that his links to Cuba began only after he left the CIA, and were motivated by his desire to expose US corruption rather than bribery. Agee’s place in history now seems to depend on where you stand politically—his obituary in the Guardian described him as motivated by a “mixture of commitment and romance,” while the Telegraph repeated the claims that he had been paid up to $1 million by Cuba.

7 Arthur Owens

Unlike Agee, there isn’t much room for debate about Arthur Owens’ motives—he once bluntly informed a fellow spy that he was double crossing everybody and only cared about making money. A proud Welsh nationalist, Owens founded a company that made batteries for ships, and had business dealings with several European navies. In 1938, he was contacted by Germany’s Abwehr naval intelligence agency and asked to become a spy. The Abwehr thought that Owens’ patriotism would encourage him to work against the hated English, but as it turned out he was more interested in money and women. In exchange for a steady supply of both, he agreed to become a spy for the Nazis.

Unbeknownst to the Abwehr, this actually wasn’t Owens’ first experience in the world of espionage. Two years earlier he had actually obtained German naval secrets on behalf of the Soviets. Now, he began making plans to betray his new employers. A few months after his meeting with the Abwehr, Owens went to the British authorities, told them where to find the radio transmitter the Germans had smuggled him, and offered to become a double agent. After briefly throwing him in prison, they accepted.

By 1940, Owens had become one of the Abwehr’s most trusted agents—almost all of the spies the Nazis parachuted into Britain were sent to see him. Of course, Owens immediately betrayed them to the British, who then gave them a choice between being executed or becoming double agents themselves. But MI5 still wasn’t particularly happy with Owens, who they suspected was secretly playing both sides and selling classified British information. They may have been right—on a trip to Lisbon, another spy was seized and taken to Germany under suspicion of being a double agent while Owens was returned unharmed.

After the Lisbon incident, MI5 decided that they couldn’t take the risk and imprisoned Owens. He still found a way to make some cash, spying on German prisoners for his old employers. Ultimately, the Welshman would have the last laugh. After the war he succeeded in blackmailing MI5 into paying him wrongful arrest compensation by threatening to write a book about his career if they didn’t.

6 Alexander Keith Jr.

As the nephew and namesake of a legendary Canadian beer magnate, Alexander Keith Jr. could probably have expected a comfortable, if fairly uneventful, life. But when his uncle gave him a job in his gunpowder business, Keith began skimming the profits for himself, setting off a huge explosion in the gunpowder magazine to cover his tracks.

During the American Civil War, Keith found his true calling—he became an agent and fixer for Confederate spies based in Canada. He quickly showed a knack for espionage, developing a bewildering range of codes and secret handshakes, and devising operations against American targets along the border. In a plan we’ve talked about before, Keith and Dr. Luke P. Blackburn plotted to spread Yellow Fever throughout the US by smuggling the clothes of deceased patients across the border.

But unbeknownst to his Confederate spymasters, Keith was loyal to nobody but himself, and he soon began ripping his bosses off with every chance he got. At one point Keith arranged to buy the same locomotive for three different Confederate groups, pocketing the money from two of them. When the train was to be delivered from America, Keith tipped off the Union authorities, who seized it at the border.

When the war finished, Keith found his source of income cut off and was forced to flee Canada. In Europe, he decided to take his fraudulent activities to a new and horrifying level—by blowing up the German steamship Mosel to collect insurance money on non‑existent cargo. By posing as Russian and Jamaican businessmen, he was able to obtain the parts needed to make a time bomb, which he hid in a wooden barrel. But the plan went terribly wrong when dockworkers dropped the barrel as they were loading it on board and the bomb went off, killing 81 people.

Keith, who had witnessed the explosion and the carnage that followed it, immediately drew a pistol and shot himself in the head twice. It didn’t work out quite as he’d hoped—he died in agony days later. In a final, brutal irony, Keith had been unable to obtain most of the insurance he’d been hoping to claim when the Mosel went up. Eighty‑one people were killed for only about £150.

5 Gun” Cohen

It was 1909, in Saskatoon, Canada, when Morris Cohen walked into a local Chinese restaurant to find an armed man robbing the place. Cohen, a former boxer, immediately punched the man to the floor and threw him into the street. It was an act that would change his life.

Morris “Two‑Gun” Cohen was born in London’s tough East End. At 18, his parents, concerned about their street‑brawling son, arranged for him to emigrate to a Jewish farm settlement in Manitoba, Canada. Within a few months Cohen had run off to join a traveling circus, eventually washing up in Saskatoon, where he became a con artist and occasional jailbird. It was there that he walked into that restaurant.

The local Chinese community, shocked that a white man had come to their rescue, quickly adopted Cohen as one of their own. He became particularly close to the restaurant’s owner, the gambler and opium merchant Mah Sam, who inducted him into the Tongmenghui, a secret society founded by the Chinese revolutionary Sun Yat‑Sen. In 1922, Cohen sailed out to China, where he quickly talked his way onto Sun’s personal bodyguard. Despite being famously bad at both Mandarin and Cantonese, he also began running spies. He acquired the nickname “Two‑Gun,” after being shot in the arm during a pitched battle in Shanghai. Concerned by the close call, Cohen taught himself to shoot with both hands, and thereafter always carried a pair of guns.

Sun Yat‑Sen died of cancer in 1925, but Cohen continued to work for a succession of Southern Chinese warlords. After the Japanese invaded China in 1937, Cohen was approached to become a spy for the British. Among his more memorable achievements was exposing Japanese poison gas stocks in Manchuria. He continued to work in this capacity until the Japanese overran Hong Kong, when he was captured, imprisoned, and tortured. Released as part of a prisoner exchange in 1943, he returned to a hero’s welcome from Canada’s Chinese and Jewish communities.

4 Henri Dericourt

Trying to lead the life of a double agent—spying for one country while pretending to spy for another—is complicated enough, but Henri Dericourt was prepared to go one step further and become one of history’s rare triple agents. A test pilot from the north of France, Dericourt escaped to England after the Nazi invasion. Regarded with suspicion by the MI5 counterintelligence service, Dericourt was nonetheless recruited by the Special Operations Executive (SOE) to be parachuted back into occupied France, where he was to run an escape network for British airmen.

Dericourt seemed to perform his task admirably, but the French Resistance soon noticed that undercover agents known to him had a higher‑than‑usual chance of being arrested. Investigating further, they were shocked to see Dericourt meeting with German agents. The SOE initially refused to believe these reports, but the real bombshell came after the war ended. German documents revealed that Dericourt had been secretly working as a Nazi double agent.

A high‑profile trial was scheduled, and Dericourt’s conviction seemed certain—until a second bombshell was dropped. Dericourt’s SOE handler, Nicholas Bodington, testified that he had authorized all of the Frenchman’s contacts with the Nazis. Furious senior SOE officers insisted that they had known nothing of the plan, and yet further investigation into Bodington’s actions was blocked by the British government.

It gradually became clear that Bodington and Dericourt had actually been working for an even more secretive organization—MI6. They had been planted into the unsuspecting SOE as a better cover for their mission against the Germans. The men Dericourt had betrayed to the Nazis were regarded as expendable. Dericourt was acquitted, but his reputation was destroyed. He was killed in 1961, when his aircraft crashed over Laos.

3 Michael Furlong

The only case on this list still not fully resolved, Michael Furlong was a senior civilian official with the US Air Force. In 2010, the New York Times reported that Furlong had been running an unauthorized secret espionage network in Afghanistan and Pakistan. A subsequent Pentagon investigation found that Furlong had set up a group of shell companies run by Lockheed Martin, which paid $22 million to a network of private agents throughout the region. Furlong’s agents gathered information on enemy positions and movements, some of which was apparently used to plan drone strikes and other attacks. The use of private contractors to carry out spying activities is against Pentagon rules.

For his part, Furlong insisted that his network had been approved by senior officers in Afghanistan and accused the Pentagon of treating him to a kangaroo court. It wasn’t Furlong’s first brush with espionage—he was expelled from Prague in 2008 for setting up an unauthorized propaganda operation. Some observers have suggested that Furlong’s network may even have been exposed by the CIA, who were supposedly concerned at the implications of the military taking intelligence‑gathering into their own hands.

2 George Blake

When asked, in later years, how he could betray his country, George Blake simply laughed, “To betray, you first have to belong. I never belonged.” Born in Rotterdam to a Dutch mother and an Egyptian‑Jewish father, Blake escaped to London disguised as a monk during World II. In England he began working for MI6 and became a British citizen. He fell in love with a local girl, but her family prevented the marriage because Blake was Jewish. Instead, MI6 sent him to Korea, where he was supposed to establish an intelligence network.

Captured when the communists overran Seoul, Blake apparently became a Marxist while imprisoned in North Korea. Welcomed back as a hero by MI6, Blake was promoted to work as a case officer in Berlin. Unbeknownst to them, he had actually made contact with the KGB and offered to become an agent. Over the next six years, he betrayed hundreds of British agents to the Russians, many of whom were subsequently executed. Betrayed in 1961, he was given what was then the longest sentence ever handed down in a British court—42 years.

But Blake’s strange story wasn’t over. In prison he struck up a rapport with his cellmate, an alcoholic Irishman named Sean Bourke, who agreed to help him plan his escape. When Bourke was released from prison, he obtained support from various left‑wing figures, including the Oscar‑winning filmmaker Tony Richardson, who financed the escape. On October 22, 1966, Blake shimmied out a prison window and climbed over a rope ladder Bourke had thrown for him. Dodging a huge manhunt, Bourke succeeded in smuggling Blake across the East German border, where he was able to make contact with his surprised Russian handlers. He spent the rest of his life in Moscow, a colonel in the KGB.

1 Sidney Reilly

Brazil, 1895. Macaws screeched in the trees as a group of English explorers set up camp in a jungle clearing. Suddenly, a band of ferocious cannibals burst from the undergrowth. The explorers were paralyzed with fear, but their 19‑year‑old cook swung into action. Seizing a revolver, he shot the cannibals dead and saved the day. Impressed, the leader of the expedition immediately rewarded him with $1,500 and a British passport.

At least, that’s the story Sidney Reilly told, and it illustrates one important fact about Britain’s legendary “Ace of Spies”—he was a compulsive liar. In reality, Reilly was born Georgi Rosenblum in what is now Ukraine. He probably arrived in England in 1895, after robbing and murdering two Italian anarchists in Paris. There, he made himself a small fortune by seducing a wealthy Englishwoman, murdering her husband, and disguising himself as a doctor to certify the death as natural. It was during this time that he apparently began working as a spy for British intelligence chief William Melville.

In 1904, Reilly and his new wife resurfaced in the Far East, then consumed by the Russo‑Japanese War. Reilly worked as a double agent for the British and Japanese, while simultaneously selling weapons to the Russians. At one point, he claimed to have stolen the Russian defense plans and smuggled them to the Japanese. Later that year, he may have played a key role in obtaining Persian oil rights for the British government rather than the Rothschilds.

In 1909, it was almost certainly Reilly who went undercover to steal weapons plans from a German factory (strangling a foreman in the process). During World I he claimed to have infiltrated the German High Command, and while this was almost certainly untrue, he did do something that earned him the Military Cross.

After the war, Reilly was sent to Russia, where he began to plot his most daring scheme yet—assassinating Vladimir Lenin and overthrowing the newly communist Soviet Union. Discontented members of the rifle regiment that guarded the Kremlin were bribed or persuaded to join the coup, and the date was set for the first week of September. Then, just days before the coup was scheduled, the operation was betrayed to the Russian secret police. Reilly’s partner was killed in a fierce gun battle after Soviet troops stormed the British embassy, and the “Ace of Spies” himself escaped across the Finnish border disguised as a secretary.

The British broke off contact with Reilly in 1921, after deciding he was untrustworthy, but he continued to carry out freelance operations until 1925, when he was lured back to Russia by a supposed rebel group. The rebels turned out to be a Soviet front and Reilly was seized, tortured, and executed. While he was imprisoned, Reilly was actually making secret notes on Soviet interrogation techniques, thinking he could sell them if he escaped. He never got the chance.

Welcome to a whirlwind tour of 10 intriguing female operatives whose daring deeds reshaped wars and intrigue. From covert couriers in the Civil War to daring radio operators in occupied France, each woman on this list proved that espionage isn’t a man’s game. Below you’ll meet spies you’ve probably never heard of, yet whose actions changed the course of history.

10 Elizabeth Van Lew

Elizabeth Van Lew, the earliest spy on this roster, fought for the Union side during the American Civil War. Residing in Richmond, Virginia, she was a widowed mother who passionately opposed slavery. Not only did she free her own slaves, she also used a $10,000 inheritance to purchase and liberate their relatives. Over nearly four years she fed intelligence to Union commanders and aided prisoners of war, earning the moniker “the most successful Federal spy of the war.” Her first “treacherous” move was volunteering as a nurse at the notorious Libby Prison, a decision that earned her scorn and hatred from fellow Southerners.

She turned the enslaved staff in her household into couriers, slipping messages to Union forces inside hollowed shoes and eggs. When prison guards barred her from speaking with inmates, she switched to using books and a personally crafted cipher. To throw off suspicion she pretended to suffer a mental disorder, talking to herself and dressing in tatters, earning neighbors the nickname “Crazy Bet.” Her spy network swelled until the war’s end, delivering some of the best Union intelligence gathered anywhere. After the conflict, Richmond ostracized her, and she lived out her days there in isolation.

9 Cecily Lefort

Born in Ireland just after the turn of the century, Cecily Lefort grew up in France and became a skilled yachtswoman. When Germany invaded in 1940, she fled to England and enlisted in the Special Operations Executive (SOE). Under the codename “Alice,” she was parachuted back into occupied France alongside fellow agents Diana Rowden and Noor Inayat Khan.

Assigned to the Jockey Network operating in the Rhône Valley, Lefort’s French tenure lasted a mere three months before a warning‑ignored house visit led to her capture. British historian M.R.D. Foot once noted her greatest contribution was suggesting the British beach near her house be used by the SOE. After brutal interrogation, she was shipped to Ravensbrück concentration camp, where she met her fate on May 1 1945, sharing the same tragic end as many captured female spies.

8 Stephanie von Hohenlohe

Thought to be of Jewish birth, Stephanie von Hohenlohe dazzled Europe with both beauty and intellect. In the early 20th century she romanced two princes—Franz Salvator of Tuscany and Friedrich Franz von Hohenlohe‑Waldenburg‑Schillingsfürst of Austria. After a scandalous pregnancy, she convinced von Hohenlohe the child was his, married him, and proudly wore the title “Princess.”

A socialite who mingled with Germany’s elite, she befriended high‑ranking officials, even Adolf Hitler, despite her half‑Jewish heritage. A World‑I nurse turned 1930s German spy, she ferried secret messages between Nazi sympathizers while in England. When war erupted, she fled to the United States, where after Pearl Harbor she was detained. In custody she supplied the OSS with a detailed report on Hitler’s personality, shaping America’s first comprehensive analysis of the Führer. Paroled in 1945, she returned to Germany, living out her later years as the infamous “Nazi Princess.”

7 Sarah Aaronsohn

Born in what is now Israel—then an Ottoman province—Sarah Aaronsohn spent most of her life there, with a brief stint in Istanbul. During a return trip she witnessed a horrific atrocity: Turkish soldiers binding up to 5,000 Armenians to a thorny pyramid and setting it ablaze. This trauma spurred her brother Aaron to recruit her into Nili, a Jewish espionage ring feeding intelligence to the British. Nili’s name derives from the biblical phrase “Netzach Yisrael Lo Yeshaker,” meaning “The Eternity of Israel Will Not Deceive.”

For nearly two years, Aaronsohn and her comrades supplied the British with critical information against Turkey. Captured on October 1 1917, she endured brutal torture yet never revealed a secret. Fearing eventual breakage that could endanger her network, she used a smuggled pistol to end her own life, succumbing four days later. Her suicide note famously read, “As heroes we died and did not confess.”

6 Velvalee Dickinson

Known as “The Doll Lady” because she ran a doll shop in New York City, Velvalee Dickinson leveraged her rarity‑collector status to funnel Allied ship movements to Japanese handlers. Frequently spotted at Japanese consulates, she dispatched letters to Señora Inez Lopez de Malinali in Buenos Aires, Argentina, embedding naval intel in seemingly innocuous correspondence. Her handler’s sloppy code made the FBI’s job easy; intercepted letters revealed discussions about U.S. naval operations.

When the FBI arrested her, they uncovered nearly $13,000 in hundred‑dollar bills traced to Japanese officials. Under pressure, Dickinson confessed, detailing the entire scheme for which she had been paid $25,000. Her ability to extract ship schedules from casual chats with locals proved deadly effective. After her handlers were exposed, she served seven years behind bars and vanished from public view upon release.

5 Denise Bloch

Born to Parisian Jewish parents, Denise Bloch grew up determined to thwart the Nazis. Her father and two older brothers fought for the French army; her brother Jean‑Claude joined the resistance, a path Denise followed for two years. Escaping Paris just before the Vel d’Hiv Roundup, the Bloch family fled to Lyon, where Denise entered the British Special Operations Executive (SOE).

The SOE orchestrated espionage across occupied Europe. Under the codename “Ambroise,” Bloch teamed with radio operator Brian Stonehouse, whose French was notoriously poor. After Stonehouse’s arrest, Bloch went into hiding, later traveling to London for radio training. She spent a year spying throughout France until the Nazis captured her in June 1944. Tortured and imprisoned, she was shipped to Ravensbrück women’s camp in early 1945, where she was executed alongside fellow agents Lilian Rolfe and Violette Szabo.

4 Noor Inayat Khan

Noor Inayat Khan entered the world in the Soviet Union in the early 20th century, born to an Indian family that soon moved to England and later France. In France she authored children’s books, but when the Nazis invaded, she fled back to England and joined the Women’s Auxiliary Air Force (WAAF). The SOE recruited her as a radio operator, assigning the codename “Madeleine.” She became the first female radio operator sent into occupied France.

Although most of her initial network was arrested shortly after her 1943 arrival, Khan chose to stay, hopping from safe house to safe house. In October, betrayal led the Gestapo to discover copies of her secret signals, a careless mistake that cost three fellow agents their lives. Imprisoned for over a year, she was eventually transferred to Dachau concentration camp, where she was executed in 1944.

3 Sarah Emma Edmonds

Sarah Emma Edmonds, better known as Frank Thompson, was a Canadian who crossed into the United States during the Civil War and enlisted in the Union army disguised as a male field nurse. She fought in several battles of the Maryland Campaign of 1862. Though official records of her espionage are scarce, her memoirs detail daring exploits.

She adopted multiple aliases, including Southern sympathizer Charles Mayberry and a Black man named Cuff—using silver nitrate to darken her skin for the latter disguise. After contracting malaria as “Frank Thompson,” she fled to a civilian hospital, fearing discovery. Branded a deserter, she later served as a female nurse in a Washington, D.C. hospital. Post‑war, she authored the bestseller Nurse and Spy in the Union Army, now freely available online.

Edmonds also earned the distinction of being the sole female member of the Grand Army of the Republic, a fraternal organization traditionally reserved for male Civil War veterans.

2 Savitri Devi

Born Maximiani Portas in early‑20th‑century France, Savitri Devi became enthralled with Adolf Hitler during her youth. Inspired by the shared swastika, she attempted to fuse Nazi ideology with Hinduism, eventually concluding that Hitler was a divine avatar akin to Vishnu’s incarnations, destined to vanquish evil, which she identified as the Jews.

Throughout the 1930s, Devi spread pro‑Axis propaganda across India while also gathering intelligence on the British. Traveling across Europe during World War II, she often entertained Allied personnel with her husband, probing them for military details. After the Nazis’ defeat, she persisted in her extremist beliefs, emerging as one of the first Holocaust deniers. Beyond politics, Devi championed animal rights and deep ecology.

1 Jeannie Rousseau

Regarded as one of the most effective World War II spies, Jeannie Rousseau served in Georges Lamarque’s resistance network under the codename “Amniarix.” Living in Paris as tensions rose, her family moved north to evade the Nazis. When the German army arrived, her father volunteered her as a liaison to the occupying forces.

Her striking looks and fluent German enabled her to extract valuable intelligence from German officers, which she eagerly passed to the Allies. When asked why she shared the secrets, she replied, “What’s the point of knowing all that if not to pass it on?” Rousseau’s reports on the Peenemünde rocket development center heavily influenced Churchill’s decision to order the raid, delaying the V‑1 and V‑2 rockets and saving countless lives. Captured multiple times, she survived three concentration camps, unlike many of her compatriots. After the war, she worked as a United Nations interpreter.

The 10 pivotal missions that defined George Washington’s clandestine war effort are as thrilling as any battlefield drama. From crafty deceptions to daring rescues, each operation showcases the ingenuity and bravery of America’s earliest intelligence operatives.

10 The Man Who ‘Could Not Tell A Lie’ Lied

George Washington first cut his teeth in the art of espionage while serving in the British forces during the French and Indian War (1754–1763). As an American officer, he was tasked with recruiting both white and Native American spies, managing their operations, and even targeting French agents with false intelligence. His commanding officer, General Edward Braddock, employed codes and ciphers, which Washington likely learned and later used himself. The necessity for solid intelligence became starkly evident when Braddock launched an attack on Fort Duquesne on September 14, 1758, without any knowledge of nearby enemy forces. The battle nearly turned disastrous, and Braddock’s command would have been annihilated if not for Washington’s intervention.

When Washington took command of the colonial forces in July 1775, they were laying siege to the British in Boston. During an inventory, he discovered a dire shortage: only 36 barrels of gunpowder—enough for each soldier to fire just nine shots. He realized that a British breakout could spell catastrophe, and that letting his own troops know of the shortage would shatter morale. So, as he often did, Washington fed the British a healthy dose of misinformation. He dispatched men into his own ranks and onto Boston’s streets, loudly proclaiming that he possessed 1,800 barrels of powder. The British stayed holed up in Boston, and Washington’s troops retained their confidence. The legendary cherry‑tree‑cutting boy, famed for never lying to his father, proved he could spin a convincing falsehood when the cause demanded it.

9 The Mercereau Family And The Staten Island Raid

In March 1776, after forcing the British out of Boston, Washington learned that the enemy had landed on Staten Island in June, preparing to seize New York City. On July 12, he convened a council of war to debate attacking the British commander, General William Howe, on the island. The generals unanimously voted against a full‑scale assault, prompting Washington to ask whether a smaller raid could be executed to “alarm the enemy.” The plan received tentative approval, with General Hugh Mercer assigned command after scouting Howe’s dispositions.

Mercer’s captain, John Mercereau, had recently lived on Staten Island, and his brother Joshua still resided there. Captain Mercereau slipped onto the island and, aided by Joshua, discovered that the British were not concentrated in a single encampment but were dispersed across civilian homes, with 600–700 redcoats stationed along the northwestern shoreline. Mercer proposed ferrying 1,400 men across the Arthur Kill to strike the British along the shore on the night of July 17, then retreat before Howe could counterattack. However, inclement weather and unfavorable tides forced a cancellation.

Despite the raid’s cancellation, the intelligence the Mercereau family supplied was so valuable that Washington enlisted them as a permanent spy network on Staten Island for at least three years, making it America’s first true spy ring. The ring was led by Joshua’s son, young John, who disguised himself as a cripple using his withered arm. When his courier was captured, John took over delivery duties, crossing the Arthur Kill on a raft with secret communiques concealed in a weighted bottle, tethered by a string. If intercepted, he could simply release the string, allowing the messages to sink safely. By 1777, the Mercereau Ring had grown so large that Washington assigned a dedicated case officer, trusting the members enough to involve them in prisoner exchanges.

8 Knowlton’s Rangers At Harlem Heights

While still stationed in Boston, Washington met Thomas Knowlton, a Connecticut captain who, like Washington, had fought in the French and Indian War. Knowlton was already a Revolutionary War hero, having repulsed several British attempts to breach the American left flank at Bunker Hill (he appears in the painting on the left, wearing a white shirt and clutching a musket). On January 1, 1776, Washington promoted Knowlton to major, assigning him command of the 20th Connecticut Continental Infantry for “special” missions. Their first task was a raid on Charlestown, Massachusetts, where General Howe was bivouacked on the night of January 8.

That evening, Howe attended a satirical play titled The Siege of Boston, which mocked Washington as a comic rube. Knowlton’s men slipped into town, burned eight buildings, and captured several British officers without a single casualty. When a soldier burst into Howe’s theater with news of the raid, the audience assumed it was part of the performance and roared with laughter.

In late August 1776, Howe prepared to attack New York City from Staten Island. Washington assumed the British would strike Manhattan, so he split his forces between Manhattan and Long Island. Howe, however, focused on Long Island, engaging Washington’s troops at Brooklyn Heights while sending the rest of his army behind the defenders. By the time Washington realized the maneuver and sent for reinforcements, it was too late; the battle resulted in a loss of approximately 1,400 men. Washington’s quick thinking saved the remaining forces, ferrying 9,000 soldiers across the East River to Manhattan in a single night.

That same month, Major John Knowlton was promoted to colonel and given command of an elite light‑infantry unit known as Knowlton’s Rangers. Their mission: reconnoiter British movements to prevent another Brooklyn Heights disaster. Although short‑lived, Knowlton’s Rangers are credited as America’s first military intelligence organization. In September, while Washington’s army recovered on northern Manhattan, Howe crossed to Manhattan and charged Washington’s camp at Harlem Heights. On the morning of September 16, Washington received news that Howe was nearby and dispatched Knowlton’s Rangers to probe the British vanguard. The two forces collided, and, contrary to orders to retreat and report, the Rangers engaged the enemy.

Howe sent the rest of his army in pursuit, prompting Washington to commit his troops as well. The clash ended in a stalemate, with both sides eventually withdrawing. The engagement lifted American morale after a series of defeats, proving they could stand toe‑to‑toe with the world’s most powerful army. However, the victory was bittersweet: Knowlton was shot and killed during the fight. His unit was captured a month later at Fort Washington, and many Rangers perished in British prisons. Despite their tragic end, Knowlton’s Rangers are considered the forerunners of the U.S. Army Rangers, Special Forces, and Delta Force.

7 Nathan Hale’s Mission To New York City

Following the Long Island debacle, Washington was desperate for intelligence on Howe’s next move. Two days after ferrying his men across the East River to Manhattan, he implored his generals to establish a “channel of information… to gain intelligence of the enemy’s designs, and intended operations.” When reliable intel failed to materialize, Washington turned to Knowlton’s Rangers. Lieutenant James Sprague was tasked with crossing back over the East River to reconnoiter Howe’s troops and determine their plans, but he refused to infiltrate enemy lines, saying, “I am willing to go and fight them, but as far as going among them and being taken and hung like a dog, I will not do it.”

Only one Ranger volunteered: Nathan Hale, a Connecticut teacher and neighbor of Knowlton who had just joined the Rangers as an officer. This would be Hale’s first and only mission. Despite his lack of espionage training, Washington sent Hale to Long Island disguised as a Dutch teacher. Hale’s plan faltered when he attempted to use his Yale diploma as proof of his teaching credentials, which displayed his real name rather than an alias. Moreover, his scarred face from a gunpowder accident made him memorable, and he received no money, civilian contacts, or cipher training. He also failed to keep his mission secret, spilling details to a fellow Yale classmate before departure.

Shortly after his mission began, the British crossed to Manhattan, rendering Hale’s original objective moot. Yet Hale chose to stay and gather intelligence anyway. He was apprehended on September 21 with incriminating papers, sentenced to execution without trial, and hanged the following morning after allegedly uttering his famous words, “I regret I have but one life to lose for my country.” Though his mission failed, Hale became a martyr and hero for the intelligence community. His death forced Washington to recognize the value of civilian spies familiar with local terrain—like the Mercereau family—over military operatives who lacked regional knowledge. While some historians debate the authenticity of Hale’s final words, eyewitnesses support their veracity, noting his possible inspiration from Joseph Addison’s tragedy Cato (“What a pity it is that we can die but once to serve our country”).

6 Washington’s Double Agent

After the Long Island loss, the British forced the colonials out of Manhattan, then New York, and finally New Jersey. By early December 1776, Washington’s army had crossed the Delaware River into Pennsylvania, suffering from hunger, disease, desertions, and dwindling enlistments. Morale was at a low point, and with Christmas approaching, a victory was desperately needed.

Enter John Honeyman, a butcher reputed to be a loyalist to the Crown. Born in Ireland, Honeyman served in the British army in Canada, fighting at the Battle of the Plains of Abraham (1759). He was honorably discharged and moved to Philadelphia in 1775, where he may have first encountered Washington. According to his grandson, Honeyman met Washington at Fort Lee, New Jersey, in November 1776 and offered his services. The reasons for a known Tory switching sides remain murky.

Washington accepted Honeyman’s assistance, instructing him to maintain his loyalist façade. As Washington’s army marched toward the Delaware, Honeyman was to pose as a butcher for the pursuing British, caring for their cattle and occasionally slaughtering them. This role allowed him to observe British dispositions, fortifications, and movements. Honeyman operated solo—no supporting agents or couriers—so if he gathered valuable intel, he was to feign capture by Washington’s sentries and be brought to the commander’s tent.

In late December, Honeyman claimed he was hunting cattle along the Delaware when colonial sentries captured him and escorted him to Washington’s tent. There, he reported that Hessian soldiers bivouacked across the river at Trenton were lax and disorganized. Washington staged a diversion, allowing Honeyman to escape. Returning to Trenton, Honeyman informed the Hessians that the colonials were “too disorganized and dispirited to pose a threat.” On Christmas Day, Washington’s forces crossed the Delaware and attacked the Hessians the next morning. The Hessians, either drunk or hung over from holiday celebrations, were quickly overwhelmed, resulting in 900 captured with only two American casualties—precisely the morale boost the Continental Army needed.

Modern historians debate Honeyman’s authenticity as a spy. Some argue he remained a staunch loyalist, offering information reluctantly. He and his family continued to face harassment as Tories after the Trenton battle, even being arrested twice for treason by New Jersey authorities, though both indictments were dismissed—leading some to speculate Washington intervened. Evidence supporting either side remains scant.

5 Lydia Darragh Warns Washington

Following Nathan Hale’s execution, Washington turned to civilians experienced in espionage. He commissioned New York merchant Nathaniel Sackett—formerly of the Committee for Detecting and Defeating Conspiracies—to establish a spy ring in his hometown, offering $500 initially and $50 monthly thereafter. While Sackett’s operation lasted only a few months, it achieved a crucial intelligence coup. By spring, it was clear General Howe would soon go on the offensive, and Washington needed to know his target.

In March, one of Sackett’s agents—an unnamed woman married to a Tory—observed the British constructing flat‑bottomed boats, likely intended to attack Philadelphia. Her report proved accurate: the British used the boats to approach the city, and on September 11, the redcoats defeated Washington at Brandywine Creek, entering Philadelphia two weeks later. Washington promptly established a spy network in the City of Brotherly Love, appointing Major John Clark—familiar with the area—to run it.

Clark swiftly organized a network of spies, assigning simple aliases like “Old Lady” and “Farmer.” Many agents were Quakers, whose pacifist stance made them ideal covert operatives, as they were expected to remain neutral and thus less suspicious. One Quaker, Lydia Darragh, independently spied on the British. Born in Ireland 48 years earlier, Darragh was a midwife, wife of a teacher, and mother of five. Her son Charles had broken with the Quakers to join Washington’s army, camping near Whitemarsh.

When the British occupied Philadelphia, General Howe set up headquarters in the house directly across from the Darragh residence. Redcoat officers became a common sight on the street, prompting Lydia to gather intelligence through observation and eavesdropping. Whenever she acquired valuable information, her husband William would write a coded note on a tiny piece of paper, which Lydia sewed beneath the top of a button. She then attached the button to her 14‑year‑old son John’s coat. John would travel to Whitemarsh, deliver the button and message to Charles, who forwarded it to Washington.

The Darragh home featured a spacious back room. In the fall, Howe demanded the family vacate so he could hold staff meetings there. Lydia convinced the general that they were harmless Quakers, and he permitted William and Lydia to remain while the children were sent elsewhere. On December 2, Howe held a crucial meeting in the Darraghs’ back room, insisting the couple retire to their rooms. Defying this, Lydia slipped into an adjoining room, hid in a closet, and overheard plans for a surprise attack on the Continentals at Whitemarsh on December 5.

The next morning, Lydia obtained a pass to cross British lines, intending to visit her children and collect flour from the Frankford Mill. En route, she encountered an American officer and relayed the imminent British offensive. The officer passed the warning to Washington as Lydia returned home. Washington already suspected Howe of planning an attack—Clark’s agents had reported British preparations—but lacked specifics on timing and location. Lydia’s detailed warning filled that gap.

When the redcoats arrived at Whitemarsh on December 5, Washington was prepared. Surprised, Howe withdrew his forces back to Philadelphia. Lydia and William faced suspicion of tipping off Washington, but Lydia persuaded a British officer of their innocence. Clark’s spy ring continued feeding Washington valuable intelligence throughout the winter of 1777‑78. When Clark’s agents reported that Howe would winter in Philadelphia, Washington decided to camp at nearby Valley Forge.

4 The Culper Ring Saves The French

In February 1778, while Washington’s troops endured hunger and hardship at Valley Forge, France signed a treaty to fight alongside America against England. That same month, General William Howe, frustrated by his failure to end the war, was replaced by General Henry Clinton as the British commander‑in‑chief. Concerned the French might attack New York City, London ordered Clinton to evacuate Philadelphia and reinforce the New York garrison.

The French fleet was en route, bound for British‑occupied Newport, Rhode Island, and requested Washington’s intelligence on British naval activity in New York harbor. Serendipity struck in August when artillery lieutenant Caleb Brewster offered his services. Brewster, an ex‑seaman raised near Long Island Sound, employed a whale boat to scout New York waters. On August 27, Brewster reported that the British were aware of the French fleet’s destination and were dispatching their own fleet to Newport. A severe storm forced the French to abandon their plans to seize Newport.

Washington retained Brewster and built a spy ring around him, appointing Major Benjamin Tallmadge—who had known Brewster since childhood—to oversee operations. Tallmadge, familiar with Brewster’s maritime expertise and the Long Island Sound, had learned espionage under Nathaniel Sackett and was motivated by his friendship with Nathan Hale from Yale.

Washington ordered Tallmadge’s dragoon troop to operate in the lower Hudson Valley and Connecticut coastal region, hunting Tories and countering British raids. Brewster acted as courier, ferrying messages from Long Island to the Continental‑controlled Connecticut shore in his whale boat, then meeting Tallmadge to deliver intelligence.

Tallmadge also recruited another Setauket acquaintance, Abraham Woodhull, and a distant relative, Anna Strong. Neither Woodhull nor Brewster had direct access to British military circles in New York, so they enlisted merchant Robert Townsend, who lived in Woodhull’s sister’s boardinghouse in Manhattan. Townsend and other Setauket residents collected snippets of information to send directly to Washington.

For correspondence, Woodhull adopted the alias Samuel Culper—a nod to Culpeper County, Virginia—while Townsend became Samuel Culper Jr., giving rise to the famed Culper Ring.

Two years later, in July 1780, the French again attempted to land at Newport. With the British having abandoned the port in 1779, the French arrived unopposed. Washington again turned to his spies for insight into British reactions. Townsend, part‑owner of a coffeehouse frequented by Clinton’s officers, learned that Clinton was massing his army on Long Island’s northern tip for an offensive against Newport.

Townsend smuggled his intelligence to Washington using invisible ink—known as “stain” or “white ink”—between the lines of a letter addressed to a Tory. Ten days after his request, Washington received a Culper Ring report: Clinton was marching 8,000 redcoats toward Newport, accompanied by nine British warships. Clearly, Clinton intended to strike the French before they could fortify their position.

While the French rushed to prepare defenses, Washington fabricated a fictitious diversionary offensive against Manhattan. He had a local farmer “discover” plans for the offensive and deliver them to a British outpost. Washington then began marching his army toward New York City. Clinton, fearing an imminent attack, recalled his troops to protect the city, thereby sparing the French forces at Newport from a British assault.

3 The Culper Ring Uncovers Benedict Arnold’s Betrayal

Tallmadge’s Culper Ring employed sophisticated espionage techniques—codes, aliases, and invisible ink—making it Washington’s most successful spy network. The group used “stain” or “white ink” and a codebook based on John Entick’s 1771 New Latin and English Dictionary. Spies could write words using a transposed alphabet, easily decoded with the key.

Meanwhile, Washington remained unaware that a serious problem simmered within his own ranks. General Benedict Arnold, once a celebrated patriot, had morphed into a traitor over just four years. At the war’s outset, Arnold passionately championed the Revolution, even financing his own men. However, the fledgling government could not reimburse him, fostering resentment.

Arnold earned fame at Fort Ticonderoga and Saratoga, rescuing the revolutionary cause twice, but his injuries prevented further battlefield glory. He was repeatedly passed over for promotion, and his stubborn thigh wound barred him from leading troops. Assigned to administrative duties in Philadelphia, Arnold’s frustrations grew, and he turned to a wealthy, charismatic Philadelphian, Margaret “Peggy” Shippen, a known loyalist still in contact with Major John André, a British officer she met during the British occupation.

Arnold married Peggy in April 1779, deepening his financial woes. By summer 1778, Arnold, aided by his wife, approached André with an offer to betray his country for money and a British commission. Over the next year, they negotiated terms. By summer 1780, Arnold began supplying high‑value intelligence, including the French fleet’s planned landing at Newport, Rhode Island. When offered command of West Point, Arnold proposed surrendering it to the British.

The exact moment the Culper Ring intercepted Arnold’s correspondence is unclear, but it appears to have occurred in July or August 1780. On July 30, Arnold was officially appointed commander of West Point; on August 15, the British agreed to pay him 20,000 pounds sterling (roughly £3.2 million today, or about $5 million).

On September 3, Arnold sent a letter to the British to finalize a meeting with André, but someone—likely a Culper Ring operative—rendered the letter unintelligible. When Arnold attempted to cross British lines on September 11, they fired upon his boat, forcing him to abort the meeting. A second attempt on September 23 saw André captured, though Arnold and Peggy escaped to join the British.

When Tallmadge met André, the latter asked about his fate. Tallmadge recounted the story of his good friend Nathan Hale, executed by André’s friend General Howe, concluding with, “Similar will be your fate.” André was hanged on October 2. Arnold received a British general’s commission but was paid only £5,000 because his plot failed.

2 Hercules Mulligan And Cato Save Washington’s Life Twice

Perhaps the least celebrated yet most vital of America’s early spies, Hercules Mulligan was a New York City tailor who immigrated from Ireland at age six. He joined the New York chapter of the Sons of Liberty, a militant anti‑British group. In July 1776, Mulligan led a mob to New York’s Bowling Green and toppled the equestrian statue of King George III. The rebels melted the lead statue into bullets for the Patriot cause.

Three years earlier, Mulligan opened his home to a teenager from St. Croix Island, Alexander Hamilton. The young Hamilton, studying at King’s College (now Columbia University), received his most important education at Mulligan’s dinner table, debating America’s grievances against the British Empire. Though initially a loyalist, Hamilton joined the Patriot cause after hearing Mulligan’s arguments.

When General Howe captured New York City in September 1776, Mulligan was arrested and imprisoned at the Provost Prison. He persuaded the British to release him by claiming he was no longer a patriot. In March 1777, Hamilton, now Washington’s aide, recommended Mulligan as a new New York spy.

As a premier tailor, Mulligan’s shop on Queen Street attracted British officers seeking uniform repairs or alterations. During fittings, Mulligan extracted intelligence from the officers. Once he gathered sufficient information, his enslaved servant Cato would ferry the parcel across the Hudson River ferry to New Jersey, delivering it to a safe house. An express rider would then rewrap the parcel and deliver it directly to Washington.

Although Mulligan occasionally cooperated with the Culper Ring, he usually operated with Cato and a translator named Hyam Salomon. Late one winter night in 1779, a British officer entered Mulligan’s shop demanding a watch coat immediately. When Mulligan asked why the urgency, the officer boasted that that night they would capture Washington, saying, “Before another day, we’ll have the rebel general in our hands.” Washington that night was meeting subordinates, and the British had discovered the meeting’s location, planning a trap. Cato was swiftly dispatched to New Jersey to warn Washington, who, on Mulligan’s tip, avoided capture.

The incident repeated in February 1781, when Washington was traveling to Newport, Rhode Island, to meet French General Rochambeau. Mulligan’s brother Hugh owned an import‑export firm that the British ordered supplies from. When a rush order arrived, an officer told Hugh that 300 cavalrymen were headed to New London, Connecticut, to intercept Washington. After receiving Mulligan’s warning, Washington’s men ambushed the cavalrymen upon their arrival at New London, thwarting the British plan.

1 Armistead’s Intelligence Coup

When France entered the war in 1778, the British attempted to sway the southern colonies against the northern ones. While General Charles Cornwallis could capture coastal cities like Savannah and Charleston, he struggled to hold interior areas of the Carolinas.

In the fall of 1780, Cornwallis marched into North Carolina, aiming to attack Washington from the south while Clinton pressed from the north. Colonial victories forced Cornwallis to retreat to South Carolina. To relieve pressure on Cornwallis, Clinton dispatched Benedict Arnold to Virginia to seize Richmond just before New Year’s Day. Arnold’s men plundered and burned the state capitol.

Just east of Richmond lay the plantation of William Armistead. In March 1781, General Marquis de Lafayette and 1,200 colonial troops arrived near Yorktown, Virginia, to harass Arnold’s army. One of Armistead’s enslaved men, James, asked his master if he could join Lafayette’s forces to drive the British invaders from Virginia. Though the British had promised emancipation to any American slave who aided them, James chose to fight for the Patriot cause. William consented.

When James appeared in Lafayette’s camp, the French commander recognized the value of a man familiar with the region. Lafayette tasked him with infiltrating Arnold’s camp, pretending to be a runaway slave offering scouting services. Arnold accepted James’s story and granted him freedom to roam the British camp, listening to conversations around campfires.

James earned such trust that when Arnold’s army merged with Cornwallis’s forces in May, he was allowed to remain as a scout for Cornwallis. In July, James sent word to Lafayette that Cornwallis planned to move down the Virginia Peninsula to Yorktown to await supplies.

At that time, Washington was planning a joint offensive with the French against Clinton in New York. When Lafayette forwarded James’s intelligence, Washington realized Cornwallis could be cornered at Yorktown. He rushed his army south to surround Cornwallis while the French fleet blockaded the coast. In October, Cornwallis was forced to surrender, effectively ending the war.

Despite his invaluable service, James returned to William Armistead’s plantation as a slave after the war. Although the new republic freed slaves who fought for the cause, James never wore a uniform, so he was not automatically emancipated. It was only through Lafayette’s advocacy that James Armistead was finally freed in 1787.

Steve is the author of 366 Days in Abraham Lincoln’s Presidency: The Private, Political, and Military Decisions of America’s Greatest President and has written for KnowledgeNuts.

Political intrigue and espionage are nothing new, and the Tudor age was brimming with them. In this roundup of 10 intriguing spies, we’ll wander through candle‑lit chambers, secret letters, and daring escapades that defined an era before gadgets and satellites. Grab a quill and settle in—these covert characters prove that the game of shadows has always been a human pastime.

10 Intriguing Spies: Tudor Shadows and Secrets

10 William Parry

During Elizabeth I’s reign, openly practicing Catholicism was a perilous gamble. William Parry was dispatched to monitor expatriate Catholics, sending frequent reports back to London that identified who posed no threat and who might be scheming against the queen from the relative safety of Paris.

His fortunes soured in 1580 when he faced a trial for allegedly assaulting a moneylender. Although the queen granted him a pardon, he could not sustain the lavish lifestyle he had grown accustomed to. By 1583, Parry began playing a dangerous double‑game, penning a letter to a Roman cardinal expressing his desire to serve the Catholic Church.

The gamble proved fatal. In 1585, Parry was hanged, drawn, and quartered for his involvement in a plot to assassinate the queen.

9 Isabella Hoppringle

Isabella Hoppringle served as the 16th‑century prioress of the Coldstream convent, perched on the volatile England‑Scotland border. While she relied on the Scots to safeguard her convent, she simultaneously penned letters to Henry VIII’s agents, relaying intelligence on the Scottish army.

Her close relationship with Scotland’s queen, Margaret, meant Isabella frequently visited Glasgow and Stirling, where she observed troops being mustered and equipped. In 1523, the Lords of Council decreed death for anyone who communicated with the English, and word of her correspondence spread. Margaret’s intercession averted an attack on the priory, but the warning was clear: Isabella’s safety hinged on her continued loyalty.

Isabella—and later her successor, Janet Hoppringle—persisted in their covert service to England, weaving religious duty with espionage.

8 George Eliot

When Jesuit priest Edmund Campion published his incendiary pamphlet Ten Reasons in 1581, it lit a fire under the Tudor authorities. The Earl of Leicester recruited George Eliot—a known con artist—to trail the priest, hoping to gather incriminating evidence and secure an arrest.

Eliot, desperate to dodge a murder charge, embedded himself in an Oxfordshire parish, monitoring Campion’s movements. He eventually summoned the local magistrate, who oversaw the priest’s capture. Campion tried to hide, but a midnight sermon he delivered for his host’s guests inadvertently drew attention, leading to his discovery.

The priest’s fate was grim: he was hanged, drawn, and quartered, underscoring the brutal consequences of religious dissent in Tudor England.

7 Bertrandon de la Broquiere

In 1432, French adventurer Bertrandon de la Broquiere embarked on a year‑long espionage trek to Palestine on behalf of the Duke of Burgundy. His mandate: gather any military intelligence that could aid a planned Crusade against the Ottoman Turks.

Bertrandon reported that the Turks were disciplined yet under‑armed, offering an optimistic view of their vulnerabilities. He also praised the kindness of those who nursed him back to health, painting the diverse peoples he met as altruistic, despite religious differences.

His journey was a tapestry of close calls, disguises, and even a stint with a Muslim caravan to Bursa. Though he returned hopeful, urging a victorious Crusade, no such campaign materialized from his intel.

6 Petrus Alamire

Petrus Alamire is a clever alias—derived from the musical sol‑fa syllables A‑la‑mi‑re—assigned to a spy who served Henry VIII while also flourishing as a musician and scribe.

Born in Bavaria, Alamire’s workshop produced some of the early 16th‑century’s most exquisite illuminated manuscripts. These lavish books were gifted to European royal courts, prompting the recipients to summon the mastermind behind them. This privileged access allowed Alamire to siphon intelligence, which he funneled to various monarchs to keep them indebted.

Alamire supplied Henry VIII with extensive information on Richard de la Pole, the last Yorkist claimant to the throne. Yet he also fed intelligence to Pole himself, and after his betrayal was exposed, he never returned to the English court.

5 Francis Walsingham

Francis Walsingham, a seasoned traveler fluent in Italian and French, acted as Elizabeth I’s spymaster for 22 years. He commanded more than fifty agents scattered across Turkey and the broader European landscape, yet the queen’s greatest peril lingered close to home.

Walsingham’s network relentlessly collected proof of conspiracies aimed at dethroning Elizabeth in favor of Mary, Queen of Scots. Even after the Babington Plot’s conspirators were hanged, drawn, and quartered, Elizabeth hesitated to sign Mary’s death warrant.

She finally authorized the execution on 1 February 1587. Walsingham supervised the grisly affair—burning Mary’s garments, encasing her corpse in lead to prevent relics, and even establishing a spy academy where agents learned to read and write encoded messages.

4 Antony Standen

Antony Standen—aka “Pompeo Pellegrini”—served among Francis Walsingham’s cadre of operatives. Stationed in Italy, he relayed intelligence on the Spanish Armada despite living in exile due to his Catholic faith.

His peripatetic life took him from England to Scotland, then France, and finally Tuscany, where he befriended the Tuscan ambassador to Spain. In 1587, officially on Walsingham’s payroll, Standen fed regular reports that enabled Sir Francis Drake to strike the Spanish fleet at Cadiz.

Standen’s insights crippled Spain’s naval power, yet by the time he returned to England in 1593, Walsingham had died and Standen’s contributions faded into obscurity. Later attempts to aid the Catholic Church in England landed him in the Tower of London.

3 William Herle

In 1571, a coalition of Philip II of Spain and Pope Pius V allied with Florentine financier Roberto Ridolfi to overthrow Elizabeth in favor of Mary. Ridolfi’s messenger, Charles Bailly, was captured and sent to Marshalsea Prison, where he encountered William Herle, a spy who had served Elizabeth I since roughly 1559.

Herle, previously arrested for piracy in 1570 (and 1567), was deliberately placed in Marshalsea to extract information from Bailly. Once Bailly was isolated, Herle stepped in as a dubious, shadowy figure capable of facilitating covert tasks.

Bailly began transmitting letters to his external contacts via Herle, who dutifully copied them for his own masters before forwarding. The unraveling of this plot reshaped the political landscape both in England and abroad.

2 William Stafford

To persuade Elizabeth I to endorse Mary’s execution, Francis Walsingham employed every conceivable tactic, including concocting plots against the queen herself.

William Stafford, younger brother of England’s French ambassador, became a devoted servant of Walsingham. In 1587, he presented a bizarre assassination scheme he claimed to have uncovered: France’s ambassador, Chateauneuf, and his secretary allegedly recruited Stafford to plant gunpowder beneath the queen’s bed.

Eventually, the French envoy and his secretary were exonerated, and Walsingham concluded Stafford was exploiting his position for extortion. Nonetheless, Stafford remained within Walsingham’s network, leaving it ambiguous whether the spymaster orchestrated the setup or if Stafford merely supplied Elizabeth with another reason to fear assassination attempts.

1 Madame de Sauve And The Flying Squadron

According to Pierre de Bourdeille’s memoirs, Catherine de’ Medici maintained a cadre of 86 (or perhaps 300) ladies‑in‑waiting whose mission was to seduce court men, extract top‑secret intelligence, and funnel it back to her. This group, dubbed the “Flying Squadron,” bolstered Catherine’s personal power and that of her family.

The most infamous among them was Charlotte de Beaune, known as Madame de Sauve. Catherine’s daughter, Marguerite, chronicled Charlotte’s flirtations with both Marguerite’s husband and her brother. Marguerite alleged that her mother engineered a rivalry between the two men, using the temptress as a pawn in a larger game of courtly manipulation.

Welcome to our deep‑dive into the top 10 blockbuster moments that have dazzled audiences and left intelligence professionals either nodding in approval or shaking their heads. In this playful yet authoritative roundup, former CIA chiefs of disguise, a defector KGB operative, and a veteran museum director break down each iconic scene, pointing out where Hollywood gets it right and where it wildly misses the mark.

10 Quick Change

Why This Is a Top 10 Blockbuster Moment

In the high‑octane sequence from Mission: Impossible III, Ethan Hunt (Tom Cruise) pulls off a lightning‑fast wardrobe swap, slipping into a priest’s cassock and slipping through a checkpoint as if it were a Sunday stroll. The camera captures every seamless motion, making the transformation feel almost magical.

Jonna Mendez, former CIA Chief of Disguise, warns that such a religious disguise is strictly off‑limits in real operations. Religious figures, journalists, and peace‑corps workers are considered protected categories; exploiting them could jeopardize both the mission and the safety of genuine clergy.

Surprisingly, Jonna gives a nod to a less‑obvious example: in the Teenage Mutant Ninja Turtles film, April O’Neil blends into a crowd by shifting from a book‑ish librarian vibe to a flirtatious schoolgirl look. The larger the crowd, the more forgiving the environment, allowing tiny adjustments—layered clothing, a quick hairstyle tweak—to go unnoticed.

9 Gadgets

Every James Bond debut brings a parade of out‑of‑this‑world gadgets, and the recent “gadget room” in Kingsman: The Secret Service is no exception. Dr. Vince Houghton notes that while the gizmos look spectacular on screen, most are either pure fantasy or sadly outdated in practice.

Jack Barsky, a former KGB operative turned American intelligence asset, recounts relying on everyday objects. He slipped messages inside film canisters and discovered hidden passports and cash stashed in a rusted oil drum—proof that creativity often trumps high‑tech.

Pens get a special spotlight in spy cinema, but in reality they’re rarely lethal weapons. Jonna Mendez recalls a few rare cases where a pen housed a miniature camera or an L‑pill—a lethal capsule designed for agents who face capture and torture. Unfortunately, L‑pills are genuine and have been employed in a handful of covert operations.

8 What Not to Wear

The Matrix ushered in a wave of leather jackets and PVC catsuits, with Neo’s long coat and Trinity’s sleek suit becoming instantly iconic. Yet, when real operatives weigh in, the fashion verdict is far less glamorous.

Jack Barsky admits, “I’ve never met a KGB officer in a leather jacket. The whole point of being a spy is that you don’t want to look like one.” William Colby, former Director of Central Intelligence, adds that a true spy is a “gray man” who can disappear into a diner without drawing a waiter’s eye.

Jonna Mendez chimes in after reviewing a classic Avengers clip featuring Uma Thurman in yet another PVC catsuit. She asks, “Why are they so popular in movies?” and answers bluntly, “Because women look great in them—at least Hollywood women do.” In genuine fieldwork, neither men nor women would be caught dead in such eye‑catching attire.

7 Masks

The Mission: Impossible franchise dazzles viewers with hyper‑realistic masks that let Ethan Hunt impersonate anyone on the planet. Experts point out that most of those transformations rely heavily on CGI and clever camera work, not on actual latex prosthetics.

During his CIA tenure, Tony Mendez engineered masks and full‑body disguises that let officers slip past KGB checkpoints, meet foreign agents, and secure dead‑drops without raising suspicion. In one daring operation, he supplied a black CIA officer and an Asian diplomat with high‑quality facial masks, allowing them to pose as Caucasian gentlemen and navigate a heavily surveilled city without hindrance.

6 Self‑Defense

In an Iron Man 2 clip, Black Widow’s acrobatic combat dazzles the audience, but Jack Barsky notes the choreography is far more aggressive than any real‑world training he experienced as a KGB operative.

He explains that while agents do receive self‑defense instruction for dangerous alley encounters, the emphasis is on evasion, not on prolonged hand‑to‑hand fights. The primary goal remains gathering intelligence silently, not drawing attention through a flashy brawl.

5 Cultural Customs

In Inglourious Basterds, a British soldier inadvertently reveals his European roots by counting on his fingers the “wrong” way—Europeans start with the thumb. The German officer instantly spots the slip, exposing the infiltrator.

Jonna Mendez stresses that mastering local customs, gestures, and etiquette is non‑negotiable for any operative. “You have to speak the language of the land, but also understand its unspoken rules,” she says. “Sometimes, once you’ve outed yourself, there’s no graceful exit—only consequences.”

4 Crowds

Blending into a bustling crowd is a spy’s safest bet for disappearing. Yet, even tiny anomalies can give an operative away, as illustrated in a Casino Royale scene where a man’s hand rests on his ear, betraying a hidden earpiece.

Jonna Mendez’s CIA team devised a hands‑free, body‑harness system to eliminate such giveaways. She also devoted years to studying how fashion cues influence perception, helping agents dress in a way that renders them virtually invisible.

Uniforms can be a useful disguise, too. While the CIA doesn’t maintain a wardrobe department, it can arrange any uniform needed for a mission, ensuring agents can slip into roles ranging from construction worker to local vendor with ease.

3 Documents

Every spy thriller shows a hero rummaging through a secret safe, pulling out forged passports and hidden IDs. In reality, such documents are far too valuable to be left unattended for a “just‑in‑case” scenario.

Experts explain that aliases are meticulously crafted for each operative, with strict controls over issuance and use. Building a credible alternate identity involves exhaustive research, forged paperwork, and layered “pocket litter”—tiny personal items like photos, receipts, and notes that reinforce the cover.

This pocket litter works hand‑in‑hand with the cover story (the next entry), forming a cohesive narrative that can survive casual scrutiny.

2 Cover Story

“Spies are people too,” says Jack Barsky. To function effectively, an operative needs a believable backstory—something they can discuss naturally, whether over coffee or at a networking event.

The Oscar‑winning film Argo dramatizes Tony Mendez’s daring rescue of six Americans from revolutionary Tehran. In real life, Mendez helped fabricate a Hollywood location‑scouting crew as the cover. The team’s fabricated purpose—searching for film sites—gave the operatives a plausible reason to be in the city, allowing them to move freely while staying under the radar.

1 Sexpionage

The thriller Red Sparrow explores the seductive art of espionage, portraying “Romeos” (male seducers) and “Swallows” (female operatives) as essential tools for intelligence gathering. The story is based on a novel by former CIA officer Jason Matthews.

All our experts concur that seduction does play a role in modern spycraft, though not in the stylized, school‑of‑seduction way Hollywood depicts. “I think sexpionage is reality,” says Jack Barsky. “I’d be surprised if any major service didn’t recruit women for covert tasks.”

However, the CIA does not run a formal “school of seduction.” Jonna Mendez confirms that while agencies may exploit personal charm when the situation calls for it, there’s no institutionalized training program dedicated solely to romantic manipulation.

In sum, the glittering allure of cinema often masks the gritty, methodical reality of intelligence work. By pulling back the curtain, our seasoned spies reveal which blockbuster moments deserve applause and which simply belong to the realm of fantasy.

Spies, secret agents, masters of covert craft—these thrilling figures have captured the imagination of ordinary folks ever since James Bond strutted onto the silver screen in a cloud of mystery and a tuxedo as dark as midnight. In this countdown of 10 famously hard female spies, we uncover daring exploits that spread like wildfire, and nothing gets our pulse racing quite like a perilous mission or a hair‑raising escape.

While most of the spotlight has historically shone on male operatives, a legion of fierce women have been pulling the strings from the shadows. It’s high time these hard‑core heroines step into the limelight. Below are ten of the most notorious female spies ever recorded.

10 Famously Hard Female Spies: Legends of Covert Courage

10 Belle Boyd

Dubbed the “Southern Belle,” Belle Boyd never set out to label herself a spy, yet her actions proved indispensable to numerous Confederate triumphs during the American Civil War. She clandestinely harvested intelligence on Union maneuvers and funneled it to the Southern cause.

In 1861, as the war erupted, Boyd resided in Martinsburg, Virginia. Eager to aid the South, she initially joined Confederate fundraising drives, but soon realized she could contribute more directly. When Union troops occupied her hometown that same year, she seized the opportunity.

Leveraging her genteel reputation and conversational charm, Boyd ingratiated herself with Union soldiers, covertly extracting valuable details while preserving her innocent façade. She smuggled this information to Confederate commanders, even daring to slip past enemy lines to warn General Stonewall Jackson of plans to torch the town’s bridges.

Boyd’s espionage wasn’t limited to intel gathering. During the Union’s occupation of Martinsburg, a soldier attempted to hoist a flag over her family home. When Boyd barred the men, one aggressive soldier forced his way in, only to meet a bullet from Boyd’s gun—she shot him dead on the spot. Hard‑core indeed.

9 Melita Norwood

On the surface, Melita Norwood appeared as a modest, unassuming secretary at Britain’s Non‑Ferrous Metals Research Association (the BNF) during the 1930s, handling appointments and filing paperwork—nothing overtly thrilling.

The twist lies in the BNF’s true purpose: it served as a front for the Tube Alloys project, the United Kingdom’s atomic weapons program. Though she lived in Britain, Norwood’s ideological leanings aligned with Soviet communism, drawing her into the KGB’s orbit.

Operating under the codename “Hola,” she was instructed to linger after hours, stealthily pilfering files from secured safes. She would duplicate the documents and discreetly deliver them to her KGB handlers at home, unbeknownst to her husband. The stolen data significantly accelerated Soviet nuclear development.

When authorities eventually uncovered her espionage years later, investigators pressed her to identify her Russian collaborators. Norwood declined, claiming a loss of memory that prevented her from recalling any names.

8 Christine Granville

Christine Granville began her adult life as a beauty queen and runway model, but World War II thrust her into the role of a daring messenger across Nazi‑occupied Europe, ferrying clandestine communications through Poland to Allied forces.

Her reputation for audacity grew as she rescued condemned soldiers, evaded gunfire, parachuted behind enemy lines, and even stitched tiny knives into the hems of her skirts. She crafted elaborate alibis, charmed both guards and their canine companions, and once feigned a fatal bout of tuberculosis by biting her tongue to escape Nazi police.

Granville’s allure proved a potent weapon; she won the affection of several high‑ranking men, including a brief liaison with Winston Churchill, who placed her in his personal espionage unit under the moniker “Willing,” a nod to her seductive yet fearless nature.

Rumor has it she inspired the female lead in Ian Fleming’s Casino Royale. Tragically, her own life ended violently when a deranged ex‑lover murdered her in London toward the war’s close.

7 Noor Inayat Khan

Noor Inayat Khan holds the distinction of being the first female radio operator for the British Secret Service and the inaugural British‑Indian spy. In World War II, she joined the “Prosper” resistance network in occupied Paris, receiving the codename “Madeleine.”

Initially, the group’s leaders doubted her ability to survive the perilous work, but Khan quickly dispelled those concerns. While many operatives were captured, she repeatedly evaded capture, constantly relocating and maintaining a lifeline of encrypted messages to London.

Her covert career met a grim turning point when a local Frenchwoman exposed her identity. The Gestapo seized her, using her personal signal books and codes to lure additional agents from London into traps, resulting in further captures.

After a daring yet failed escape attempt, Khan endured solitary confinement and brutal torture. She never betrayed any of her contacts, ultimately meeting her death at the hands of the Nazi police—a testament to her indomitable spirit.

6 Mata Hari

Mata Hari cultivated an exotic persona as an Asian‑style dancer, using her stagecraft as a veil for espionage—a truly striking combination.

She toured Europe with a series of provocative performances, weaving elaborate tales of a mystical upbringing—some claimed she was born in a sacred Indian temple, others that she learned dance from priestesses.

Her seductive charisma and flamboyant demeanor made her an ideal courier for the Allies at the outbreak of World War I. She seduced high‑ranking military officials from rival nations, coaxing them to reveal weaponry plans and strategic moves, which she then passed to the opposing side, allegedly causing thousands of casualties.

Debate persists over the true extent of her effectiveness; some modern historians argue her legend was inflated or that she may never have been a spy at all. Nonetheless, she was suspected of double‑agent activity, and before her duplicity could be fully exposed, French authorities captured her and executed her by firing squad in 1917.

5 Virginia Hall

Virginia Hall, an American operative who served with Britain’s Special Operations Executive, earned a reputation as one of the most formidable spies of World War II, later joining the U.S. Office of Strategic Services and eventually the CIA.

During a hunting excursion in Turkey, Hall suffered a gun accident that led to the loss of her leg. She replaced it with a wooden prosthetic she christened “Cuthbert.”

Undeterred, Hall orchestrated extensive spy networks, rescued prisoners of war, and recruited hundreds of agents to sabotage Nazi operations. The Germans nicknamed her the “limping lady,” yet her cunning kept her perpetually a step ahead of their counter‑intelligence.

Her extraordinary contributions earned her the Distinguished Service Cross—the only civilian woman ever to receive the award.

4 Nancy Wake

Nancy Wake’s early life was far from glamorous; born into poverty in Australia, she later became a journalist before marrying a wealthy French industrialist, granting her access to high‑society circles.

Witnessing the horrors of Nazi occupation, Wake threw herself into the French Resistance at the war’s outset. She established vital communication links between British forces and the Resistance, covertly guided Allied personnel across France to safety in Spain, and amassed weapons caches for the advancing troops.

Legend credits her with executing German spies, and rumors suggest she once killed a German soldier with her bare hands—feats that earned her the nickname “White Mouse,” as the Gestapo could never catch her.

Her daring exploits cemented her status as one of the most celebrated resistance fighters of the era.

3 Anna Chapman

Anna Chapman can be summed up in three words: bold, Russian, spy.

She figured prominently in a Russian spy ring operating in the United States, spending years gathering any intelligence that could aid Moscow’s agenda.

Media speculation once claimed she attempted to seduce NSA whistle‑blower Edward Snowden, hoping to lure him to Russia, marry him, and extract secrets directly from his mind—a plot as dramatic as any thriller.

Beyond espionage, Chapman also pursued a modeling career, leveraging her public profile to infiltrate circles where classified information circulated. In 2010, she was arrested in New York, pled guilty to conspiracy, and was subsequently deported.

2 Josephine Baker

Josephine Baker dazzled audiences as a singer and dancer, achieving worldwide fame in the 1920s with her feather‑laden costumes and exuberant performances that made her a staple on Broadway and across Europe.

Few know that she also served the French Resistance during World II, smuggling encoded messages hidden within sheet music and, on occasion, in her intimate apparel. For these covert contributions, she received French military honors.

1 Ana Montes

Ana Montes rose to notoriety as a Cuban intelligence asset who infiltrated the United States, beginning her career with the Defense Intelligence Agency in 1985, where she cultivated a reputation as an expert on Cuban affairs.

Her ideological opposition to U.S. foreign policy made her a perfect recruit for Cuban handlers. Possessing a prodigious photographic memory, she could memorize classified documents and encrypted files, later reciting them verbatim to her contacts.

When suspicions grew among her colleagues, Montes voluntarily underwent a polygraph test, passing with flying colors and thereby maintaining her cover. She continued covertly supplying Cuba with sensitive information for several more years.

In 2002, the FBI amassed sufficient evidence to charge her; she pleaded guilty to espionage and received a 25‑year prison sentence, with a tentative release date slated for 2023.

When you hear the phrase 10 notable spies, images of trench coats, whispered meetings, and high‑stakes double‑crosses probably spring to mind. The Cold War was a chessboard of covert operatives, each playing a risky game that could end in fame, infamy, or a fatal end. Below, we count down the ten most intriguing agents whose shadowy work left a lasting imprint on history.

10 Notable Spies of the Cold War

10 Raymond Mawby

Raymond Mawby, a British Member of Parliament who passed away in 1990, once served as an assistant paymaster general and later as a junior minister. A BBC investigation revealed that, between 1960 and 1971, he was also feeding the Czechoslovakian security service with insider information, effectively moonlighting as a spy for over a decade.

During his clandestine career, Mawby handed over a treasure trove of sensitive political intel to communist operatives, including a hand‑drawn floor plan of the Prime Minister’s office in the Commons, details on parliamentary committees, and confidential investigations targeting another Conservative politician.

Operating under the codename “Laval,” Mawby’s espionage began at a 1960 cocktail party where he was coaxed into selling political gossip for cash – exactly £100 per tidbit. Even after his promotion to junior minister in 1963, he kept the money flowing until the relationship was abruptly terminated in November 1971.

9 Michał Goleniewski

Michał Goleniewski rose to a senior rank within Poland’s intelligence service, yet he also acted as a KGB operative before turning into one of the West’s most valuable double agents during the Cold War.

His early career was marked by collaboration with the Nazis during World War II, after which he became a high‑ranking counter‑intelligence officer for Polish intelligence. Later, he supplied the Soviet Union with detailed reports on Polish intelligence activities.

In April 1958, Goleniewski voluntarily defected to the United States. Over the next 33 months he smuggled a massive cache of top‑secret Soviet and Warsaw‑bloc military and espionage information to the West, exposing 1,693 communists embedded in Western intelligence and government bodies.

8 Otto von Bolschwing

Otto von Bolschwing entered the Nazi Party early, eventually becoming Heinrich Himmler’s deputy in the Reich Main Security Office, where he focused on the so‑called “Jewish problem.” In 1937 he devised terror tactics aimed at forcing Jews out of Germany and looting their possessions.

His radicalism led him to support Romania’s anti‑Jewish Iron Guard and even attempt a coup against a German‑allied government. After the war, Bolschwing fled to American‑occupied Austria, where he later joined the CIA under the code name “Agent Unrest,” his Nazi past overlooked in favor of his anti‑Soviet value.

From Austria, he leveraged his Eastern‑European connections to aid U.S. intelligence efforts until 1953, illustrating how Cold‑War espionage sometimes recruited former enemies for strategic advantage.

7 Gunvor Galtung Haavik

Gunvor Galtung Haavik served as a clerk in Norway’s Foreign Ministry while simultaneously acting as a Soviet agent for more than 27 years. Her espionage career began during World II, when she worked as a nurse and interpreter for Soviet prisoners held by the Nazis, falling in love with a Russian POW.

When the Nazis threatened her lover’s safety, the KGB promised protection in exchange for her cooperation. By the time Norway joined NATO in 1949, Haavik had already signed a long‑term spy contract with the Soviets.

Suspicion grew as Soviet diplomats seemed unusually well‑informed about Norway’s classified positions, especially regarding European Community membership. Norwegian counter‑intelligence eventually caught her meeting KGB operative A.K. Printsipalov, leading to her arrest in 1977. She confessed to spying for the USSR but died of heart failure before her trial could conclude.

6 Oleg Vladimirovich Penkovsky

Often hailed as one of the West’s most valuable double agents, Oleg Vladimirovich Penkovsky began his military career in the Soviet Red Army in 1937, later serving as an artillery officer during the Nazi invasion of World II.

By 1949 he had moved to the Soviet Army Intelligence Directorate (GRU) and attended the Military Diplomatic Academy, eventually becoming a colonel stationed in Moscow by 1960.

In April 1961, Penkovsky turned against his homeland, offering his services to British intelligence via businessman Greville M. Wynne. Over the next eighteen months he supplied British and U.S. agencies with more than 5,000 photographs of classified Soviet military, political, and economic documents, crucially revealing the limited long‑range missile capabilities of the Soviet Army during the 1962 Cuban Missile Crisis.

5 Elizabeth Bentley

Born in Connecticut, Elizabeth Bentley earned degrees in the humanities from Vassar College and Columbia University. In 1935 she joined the American League against War and Fascism after witnessing fascism in Italy, and later briefly became a member of the U.S. Communist Party.

Bentley’s espionage career began when coworker Juliet Stuart Poyntz recruited her at the Italian Information Library. She gathered intelligence on fascist activities and later worked as Poyntz’s secretary, linking her to a Soviet‑backed travel agency that facilitated espionage.

When Soviet spymaster Anatoly Golos died in 1943, Bentley grew disillusioned, eventually turning to the FBI as a double agent. Her testimony helped convict eleven Communist Party leaders, marking a significant blow to Soviet influence in the United States.

4 Adolf Tolkachev

Adolf Tolkachev, a Soviet engineer, became one of the CIA’s most important assets during the Cold War. Beginning in 1978, he leaked top‑secret details about Soviet radar technology, avionics, and cruise missiles, earning the nickname “Billion Dollar Spy” for saving the United States roughly $2 billion in weapons research and development.

Operating under the constant watch of the KGB, Tolkachev arranged twenty‑one clandestine meetings with CIA officers on Moscow streets over two decades. He smuggled documents out of his military laboratory by concealing them within his overcoat and photographing them covertly.

Declassified records indicate his motivation stemmed from his family’s suffering during Stalin’s Great Terror, prompting him to undermine the very regime that had once devastated his relatives.

3 Hede Massing

Hede Massing was born in Vienna in 1900 to a Polish father and Austrian mother. She joined the Communist Party around 1920 and married Gerhart Eisler, a prominent German Communist. Between 1933 and 1937, Massing served as a Soviet espionage agent in the United States.

Later, disenchanted with Stalin’s regime, she turned staunchly anti‑communist. In 1949 she played a pivotal role in the Alger Hiss espionage trial, testifying that Hiss had been working for the Soviet Union against U.S. interests.

Although her testimony contained some inconsistencies, it directly contributed to Hiss’s 1950 conviction for perjury, marking a high‑profile victory for U.S. counter‑intelligence.

2 Philip Agee

Born in 1935, Philip Agee served as a CIA officer before becoming a whistleblower. His transformation occurred amid the chaotic era of the Vietnam War, Watergate, and growing public disillusionment with U.S. foreign policy.

Agee left the CIA in 1969 after twelve years, driven by the belief that the agency was undermining democracy to serve American interests abroad. In 1975 he published “Inside the Company: CIA Diary,” an unprecedented expose revealing the extent of CIA covert operations in Latin America.

Unlike earlier whistleblowers, Agee disclosed the identities of CIA officers, agents, and assets in the field. Despite criticism, he continued to challenge CIA operations and U.S. policies he deemed objectionable.

1 Aleksandr Dmitrievich Ogorodnik

Aleksandr Dmitrievich Ogorodnik, born in 1939, was a Soviet diplomat who turned into a CIA spy at the height of the Cold War. Initially seen as an unlikely candidate, he was recruited by the Colombian intelligence agency and the CIA, operating under the codename TRIGON (or Trianon).

Ogorodnik’s value stemmed from his access to secret diplomatic cables within the Soviet Foreign Ministry. He photographed these cables and transmitted them to the CIA, even requesting a suicide pill—known as the L‑pill—as a contingency.

The exact reasons for his defection remain murky, though financial strain and deep discontent with Soviet bureaucracy are likely factors. Captured by the KGB in Moscow, Ogorodnik chose to ingest the L‑pill, ending his life and leaving many questions about the full scope of his espionage activities.