Directed by: Alfred Hitchcock
Starring: Robert Donat, Lucie Mannheim, Godfrey Tearle, Madeleine Carroll
Character mistake: The Professor refers to his pistol as a "revolver" but it is a semi-auto.
Character mistake: During Mr Memory's act at the beginning of the film, he gives the answer regarding the last British heavyweight boxing champion and then says, "Am I right, sir?", but the question was asked by a woman.
Continuity mistake: When Professor Jordan is speaking to Hannay, he draws out a revolver with his left hand, but when the Professor's wife leaves the room, we cut back to the Professor, and he now has the revolver in his right hand.
Heckler in Audience: How old is Mae West? How old is Mae West?
Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen tossing some litter as Richard and Annabella run from the music hall.