Continuity mistake: The painting changes from the time it is made until the time the detective looks at it.
Blackmail (1929)
Directed by: Alfred Hitchcock
Starring: Anny Ondra, Charles Paton, John Longden, Sara Allgood
Continuity mistake: When the artist speaks to his landlady, his walking cane is tucked horizontally under his arm. In the very next shot, however, the cane jumps to a vertical position and is now in his hand. (00:21:00)
Trivia: Hitchcock's cameo is towards the beginning on the train. The little boy is playing with his hat.
Tracy: Detectives in glass houses shouldn't wave clues.
Tracy: Look, here, Miss, you tell him! Tell him that he's playing with fire. And we shall all of us burn our fingers.
Alice White: You and your Scotland Yard. If it weren't for Edgar Wallace, nobody'd ever heard of it.
