Revealing mistake: When Jim plays the organ for John he switches to a lively piece at the end of his performance, but he stops moving his arms and hands. (00:28:30)
Continuity mistake: When John comes to Billy Hanson's murder scene a police photographer takes a picture of him while he is standing in the middle of the room. When the picture is used later as evidence in the court trial it shows John standing in the door. (00:33:25 - 01:12:25)
Continuity mistake: When John enters Sonny's office for the first time he takes his sunglasses off twice in successive shots. (00:05:40)
