Character mistake: When McCall put his gun to his head and pulled the trigger, he's saddened that it didn't go off. Most handguns (including the one he was using), after the last round is fired, the slide locks to the rear. He would not have made the mistake of thinking it was loaded.
Continuity mistake: In the hospital after the explosion, they lift Collins from the gurney to the bed, and you can see there are no vital signs because she has not been hooked up. In the next shot, the machine is showing all her vitals. (01:17:47)
Continuity mistake: When the Mafia boss dies, he falls next to a fruit stall. A crate falls next to his head, and fruit falls on the floor. When the shot changes, the crate has moved away, and the fruit has vanished.
Continuity mistake: When Robert is sitting at the café in the evening, the young man brings him a tea order. Robert prepares and puts out his napkins twice, from 2 different angles. (00:45:33)
Factual error: A morning scene in the fictional town of Altamonte is preceded by a picturesque sunrise. Atrani, the town used as the filming location, and the whole Amalfi Coast are on the west coast of Italy, which means the sun over the sea near the horizon could only be a sunset. (00:48:07)
