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)
Continuity mistake: Once Constantine and Chas make it to the address given to them by the demon, Constantine knocks on the door with the knocker ring. Between shots the ring suddenly becomes larger after he stops knocking. (00:26:00)
Continuity mistake: At the table when Constantine is talking with Chas, they mention him throwing up on his aunt at a wedding and Constantine says he thought she took it fine. He lowers his hand with his cigarette pointed down in the close up. But in the next angle it's suddenly pointed up. (00:05:35)