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.