Greatest Spies in History
From Cold War moles to WWII resistance legends, who was the most consequential spy ever to operate in the shadows? Cast your vote and rank them.
What counts: Ranked by overall historical impact — intelligence gathered, lives affected, wars or policies shaped, and lasting notoriety. 'Caught' means exposed, arrested, or killed while active; years and ratings are approximate and drawn from historical consensus, not classified records.
The exotic dancer turned accused German agent became the archetype of the femme fatale spy, seducing French officers for pillow talk during WWI. Whether she was a real spy or a scapegoat remains debated, but her 1917 execution by firing squad cemented her as the most famous spy n
Active Years: 1900s-1917Affiliation: Netherlands (alleged German agent)Historical Impact: 8/10Ever Caught/Exposed: ✓
added by IJRMata Hari
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Often called the real-life 'Ace of Spies,' Reilly ran audacious British espionage operations across Russia, even plotting to overthrow Lenin's government in 1918. His flamboyant, multi-identity career inspired the James Bond mythos before the Soviets lured him back and killed him
Active Years: 1890s-1925Affiliation: Britain (Russian-born)Historical Impact: 8.5/10Ever Caught/Exposed: ✓
added by IJRSidney Reilly
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The most damaging mole in British intelligence history, Philby rose to senior MI6 rank while secretly feeding the KGB for three decades, betraying countless agents to their deaths. His 1963 defection to Moscow, after evading suspicion for years, remains the definitive Cold War be
Active Years: 1930s-1963Affiliation: Britain (Soviet mole)Historical Impact: 9.5/10Ever Caught/Exposed: ✓
added by IJRKim Philby
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A Soviet master spy embedded as a journalist in Nazi Germany's Tokyo embassy, Sorge gave Stalin the exact date of the German invasion and, crucially, confirmed Japan wouldn't attack the USSR — freeing Soviet troops to save Moscow. Arrested by Japan in 1941, he was executed in 194
Active Years: 1929-1944Affiliation: USSR (posted in Germany/Japan)Historical Impact: 9/10Ever Caught/Exposed: ✓
added by IJRRichard Sorge
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An American with a wooden leg who became the Gestapo's most-wanted Allied agent in France, Hall built resistance networks, coordinated sabotage, and escaped over the Pyrenees on foot when compromised. She never got caught despite a massive manhunt, later earning a rare Distinguis
Active Years: 1940-1945Affiliation: USA/Britain (SOE/OSS)Historical Impact: 9/10Ever Caught/Exposed: —
added by IJRVirginia Hall
0Juan Pujol García ('Garbo')
A Spanish double agent who convinced the Nazis he was running a vast network of British sub-agents — all invented — and used that trust to feed false D-Day intelligence that helped convince Hitler Normandy was a diversion. Both Britain and Germany decorated him, unaware he'd only
Active Years: 1941-1945Affiliation: Spain (for Britain, vs. Germany)Historical Impact: 9/10Ever Caught/Exposed: —
added by IJR
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A CIA counterintelligence officer who sold out to the KGB for cash, Ames's betrayal led to the exposure and execution of at least ten US assets inside Soviet intelligence. His arrest in 1994, triggered by lavish unexplained spending, exposed one of the deepest penetrations of Ame
Active Years: 1985-1994Affiliation: USA (CIA, Soviet/Russian mole)Historical Impact: 8/10Ever Caught/Exposed: ✓
added by IJRAldrich Ames
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An FBI agent who spied for Moscow for over two decades while working counterintelligence himself, Hanssen sold codebreaking secrets and blew the cover of double agents, causing damage the DOJ called possibly the worst in US history. He was finally caught in 2001 during a dead-dro
Active Years: 1979-2001Affiliation: USA (FBI, Soviet/Russian mole)Historical Impact: 8.5/10Ever Caught/Exposed: ✓
added by IJRRobert Hanssen
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A disillusioned Soviet military intelligence colonel who passed missile secrets to the CIA and MI6, Penkovsky's intelligence was pivotal in helping Kennedy navigate the Cuban Missile Crisis without blinking. Betrayed and executed by the Soviets in 1963, he's remembered as the spy
Active Years: 1960-1962Affiliation: USSR (spied for the West)Historical Impact: 8.5/10Ever Caught/Exposed: ✓
added by IJROleg Penkovsky
0Markus Wolf
Nicknamed 'the man without a face' because Western intelligence had no photo of him for decades, Wolf ran East Germany's Stasi foreign intelligence with legendary skill, famously deploying 'Romeo agents' to seduce secretaries in West German ministries. He died a free man in 2006,
Active Years: 1953-1986Affiliation: East Germany (Stasi intelligence chief)Historical Impact: 8/10Ever Caught/Exposed: —
added by IJR
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A British-Indian SOE radio operator dropped into occupied France, Khan kept transmitting vital intelligence even after her network collapsed around her, refusing to flee when she could have. Captured, tortured, and executed at Dachau in 1944, she was posthumously awarded the Geor
Active Years: 1943-1944Affiliation: Britain (SOE, occupied France)Historical Impact: 7.5/10Ever Caught/Exposed: ✓
added by IJRNoor Inayat Khan
0Nathan Hale
America's first celebrated spy, Hale volunteered for a reckless intelligence mission behind British lines in 1776 and was captured almost immediately, allegedly declaring 'I only regret that I have but one life to lose for my country' before his hanging. His martyrdom, more than
Active Years: 1776Affiliation: USA (Revolutionary War)Historical Impact: 7/10Ever Caught/Exposed: ✓
added by IJR
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A physicist on the Manhattan Project who secretly handed nuclear weapon design details to Soviet handlers, Fuchs single-handedly accelerated the USSR's atomic bomb program by years. His 1950 confession and conviction sent shockwaves through Western intelligence about the depth of
Active Years: 1941-1949Affiliation: Britain (atomic spy for USSR)Historical Impact: 8/10Ever Caught/Exposed: ✓
added by IJRKlaus Fuchs
0The lesser-known 'fifth man' of the Cambridge Five spy ring, Cairncross passed Bletchley Park's Ultra decrypts to Moscow, reportedly including intelligence that helped the Soviets win the Battle of Kursk. He avoided prosecution by quietly confessing decades later, escaping the fa
Active Years: 1937-1951Affiliation: Britain (Cambridge Five, Soviet mole)Historical Impact: 7.5/10Ever Caught/Exposed: —
added by IJRJohn Cairncross
0Elizabeth Bentley
Dubbed the 'Red Spy Queen' by American tabloids, Bentley ran a Soviet espionage network inside Washington before a crisis of conscience led her to defect and name names to the FBI in 1945. Her testimony helped ignite the Cold War Red Scare, exposing dozens of Soviet assets across
Active Years: 1938-1945Affiliation: USA (Soviet spy, later informant)Historical Impact: 7/10Ever Caught/Exposed: —
added by IJR
0Eddie Chapman
A British criminal recruited by the Nazis as agent 'Fritzchen,' Chapman immediately turned himself into MI5 and became double agent 'Zigzag,' feeding Germany false bomb-damage reports that misdirected V-1 rocket strikes away from London. His swagger and genuine loyalty-switching
Active Years: 1942-1945Affiliation: Britain (double agent 'Zigzag')Historical Impact: 7/10Ever Caught/Exposed: —
added by IJR
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A Boer saboteur turned German agent, Duquesne led the largest espionage ring ever busted on US soil, the 33-member Duquesne Spy Ring rolled up by the FBI in 1941 using a double-agent handler. His decades-long vendetta against the British Empire and eventual capture made for one o
Active Years: 1914-1941Affiliation: Germany (Duquesne Spy Ring, USA)Historical Impact: 7/10Ever Caught/Exposed: ✓
added by IJRFritz Joubert Duquesne
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A teenage Confederate sympathizer who charmed information out of Union officers and rode through battle lines to deliver intelligence to Stonewall Jackson, Boyd was arrested repeatedly yet kept returning to spying. Her flair for theatrical self-promotion afterward made her the Ci
Active Years: 1861-1865Affiliation: Confederate StatesHistorical Impact: 6.5/10Ever Caught/Exposed: ✓
added by IJRBelle Boyd
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A glamorous member of Russia's 'Illegals Program' sleeper network in New York, Chapman became a media sensation when the FBI arrested her and nine others in 2010 in one of the largest post-Cold War spy swaps. She was traded back to Russia within weeks, instantly becoming a celebr
Active Years: 2000s-2010Affiliation: Russia (Illegals Program, USA)Historical Impact: 6/10Ever Caught/Exposed: ✓
added by IJRAnna Chapman
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Along with his wife Ethel, Rosenberg ran a spy ring that passed American atomic secrets to the Soviet Union, a betrayal that helped Moscow build the bomb far sooner than expected. Their 1953 execution for espionage remains one of the most controversial and politically charged spy
Active Years: 1940s-1950Affiliation: USA (atomic spy for USSR)Historical Impact: 7.5/10Ever Caught/Exposed: ✓
added by IJRJulius Rosenberg
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