Continuity mistake: Constantine wakes up from a nightmare and sits up in his bed clutching his head. The window beside him has the blinds wide open with Big Ben seen through the window. But in the next shot suddenly the blinds are down covering a lot of the window. Also his bed posts change shapes. (00:03:10)
Continuity mistake: Constantine drives to where Beroul had teleported Chas, and Chas angrily gets into the car and slams the door shut. He does not put on his seatbelt and places his hands on the steering wheel before lowering his head a bit. It cuts to a close up before he turns to look at Constantine again, and suddenly he has his seatbelt on. (00:35:40)