A Perfect Traitor

S1 E4: He was the most dangerous mole in intelligence history, an FBI security specialist who supplied the KGB with the identities of hundreds of U.S. double agents in Russia and thousands of pages of America’s most closely guarded secrets. This is the story of Robert Hanssen, who systematically compromised every single operative the FBI had working in Russia. Host Damian Lewis reveals how Hanssen’s actions pitted the CIA against the FBI and triggered a mole hunt that brought the American intelligence services to their knees.