Deliberate "mistake": When Constantine comes out of the library after speaking with Gabriel, he stands beside Angela and none of them cast any noticeable shadows on the door and walls behind them. When it cuts to a shot above them, shadows are more being cast behind them. This is probably because of different light settings on the set.

Continuity: When Constantine is seeing the doctor about his cancer you can see the lights on the screen showing the X-rays are on. When it cuts after she says "This is aggressive", the lights are suddenly off.

Revealing: When Chas is being thrown up and down between the ceiling and the floor, if you look closely as Chas is falling from the ceiling to the floor and goes up again, when he goes up it's just a rewind of him falling down.

Continuity: When Constantine tells Angela to leave the room you can see the cat sits on his lap with its back against the camera. When it cuts the cat is now facing forward.

Continuity: When Chas is being thrown up and down between the floor and the ceiling he lands and breaks some bricks on the floor. The damage on the bricks change between the shots.

Continuity: When they are luring the demon into the mirror they have tied a chord to it. When the mirror come flying out the window we can still see the chord tied to it. But when it cuts to the mirror falling down hitting the car the chord is gone. And don't tell me the chord just went off, because it was tied quite well.

Continuity: When Constantine places the medallion on the possessed girl's head she starts screaming and waving her hands. When it cuts to a close-up of her we can see her hand is still. In the next shot she waves her hands again.

Continuity: When Midnite is about to make a prayer for Constantine he holds his hands up. He only points with two fingers with his right hand. But when it cuts all his fingers are stretched out.

Continuity: When Constantine submerges Angela in to the tub he pulls up his right arm from her head. When it cuts to a shot under water he pulls up his arm again.

Continuity: When Constantine and Chas gets in to the car and Chas is angry about Constantine dropping a mirror on his car, Chas has his hands down. When it cuts his left hand rests on the steering wheel.

Continuity: In the beginning when the woman takes the pot out of the oven and is about to pour the hot water into the cup, she places her left hand on the table beside the cup. When it cuts to a close-up her hand is gone.

Continuity: In the beginning when the woman is about to pour hot water in to her cup we can see a spoon on the tray. When it cuts the spoon has changed position, and also a piece of paper has appeared on the tray.

Continuity: When Constantine gets thrown into the glass paned door at the end just before he slashes his wrists, every time it cuts to the scene showing the door the broken glass left in the door is always in a different pattern.

Continuity: When Angela walks out of the confession box she grabs her necklace cross and holds it. When it cuts from behind her, both her hands are down.

Continuity: In the end when Constantine slits his wrists there is a shot where you see the pools of blood from his wrists. The scene changes for a few minutes and there is another shot where the blood is visible and the pools are smaller than before. If anything they should have been bigger.

Continuity: In the X-ray room when Constantine has lowered his cigarette he is standing next to Les and walks away. Their conversation goes on for a couple of shots and then suddenly he is standing right next to Les again and walks away.

Deliberate "mistake": When Constantine and Angela are driving while talking to Beeman, as Beeman says "But that doesn't mean that we don't have faith in you", the lights in the car suddenly go off. Revealed by the DVD commentary, it is the cinematographer's lights going off by mistake.

Continuity: When Constantine is heading for Midnite's office, he stops by his door. A man opens the door and walks out passing Constantine. At that time you can see the background is full of people. When it cuts to Constantine walking in the door the background has changed, the people are gone and a blue wall has appeared instead.

Continuity: After Constantine has thrown the holy water at Baltazar you can see Baltazar stretching out both hands to grab Constantine. When it cuts, Baltazar grabs Constantine by his throat with only one hand .

Continuity: During the exorcism scene Constantine says "I need a mirror, now. At least 3 feet high.", while holding his left arm down. When it cuts to him shouting "Move." his left arm is up.