The Spy Killer is a 1969 British action thriller drama spy television film originally aired on ABC and directed by Roy Ward Baker. Its teleplay, written by Jimmy Sangster, was based on his own 1967 novel private i. The film starred Robert Horton, Sebastian Cabot, and Jill St. John and revolves around a one-time secret agent who is blackmailed by his former boss back into the world of espionage which he had intended to leave permanently. In the following year, a sequel titled Foreign Exchange was released with the same main cast and crew.