John Pilge

Continuity mistake: When in James Mason's house in South Dakota, Cary Grant writes a message to Eva Marie Saint on a matchbook from which several matches are missing. When Ms. Saint subsequently reads the message the matchbook is full.

Trivia: If you look closely in one of the shots looking at the musician's pad you can see Hitchcock making a cameo like he does in all his movies. If you pay attention however, you might notice that this is a reenactment of a scene from one of his other movies, 'Rope.' Also, Hitchcock is standing in for James Stewart and the character he played in 'Rope' since Mr. Stewart is busy spying on this scene. (00:26:15)

Continuity mistake: When Cary Grant writes a message on a matchbook and Eve Marie Saint reads it, the number of lines in the message changes. He writes 3 lines, she reads 4 lines. (01:58:30)

Revealing mistake: In the shooting scene in the Mount Rushmore cafe, a boy in the background puts his fingers in his ears, because he knows the gun is about to be shot.