Trivia: Hitchcock's cameo is towards the beginning on the train. The little boy is playing with his hat.
Blackmail (1929)
1 trivia entry
Directed by: Alfred Hitchcock
Starring: Anny Ondra, Charles Paton, John Longden, Sara Allgood
Continuity mistake: The painting changes from the time it is made until the time the detective looks at it.
Alice White: You and your Scotland Yard. If it weren't for Edgar Wallace, nobody'd ever heard of it.
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