Hitchcock's first "talkie" film! A Scotland Yard detective finds out that his girlfriend is involved in a murder. He conceals her guilt and becomes entangled in a web of deceit. Featuring a climactic chase scene in the British Museum and Hitchcock's first cameo appearance, Blackmail has offered thrills and suspense since 1929.

The Criterion edition offers audio commentary by screenwriter Charles Bennett and a vintage 1920s "talkie demo."