Secret Agent is a 1936 British film directed by Alfred Hitchcock, based on a novel by W. Somerset Maugham. The film starred John Gielgud, Peter Lorre, Madeleine Carroll and Robert Young. Future star Michael Redgrave made a brief, uncredited appearance.
Typical Hitchcockian themes used here include mistaken identity and murder. The film is notable for calling the hero's superior by a single letter, an idea which writer Ian Fleming would use in his James Bond stories.