Continuity mistake: The case files which Agent Cowles brought to the kitchen and put on the countertop disappear shortly after being placed there. (00:08:30 - 00:09:10)
Continuity mistake: When John is shot at he gets a flesh wound on his cheek. A few shots later in the hospital bed, the wound has moved all the way up to the forehead. (01:30:00)
Revealing mistake: Opening scene: in the first shot where the murder victim is fully visible and the camera zooms in a little, the supposedly dead victim is obviously breathing in (his chest is moving a lot). (00:01:05)
Continuity mistake: When Colin Farrell is shot on the train he falls with his cheek facing his right shoulder. A few seconds later when the camera is back on him he is facing the left.
