Visible crew/equipment: Near the beginning of the movie, the old priest is in Northern Iraq and you can see the shadow of a microphone on his hat.

Continuity: When Sharon is taking a walk with the priest Damien, she throws her cigarette to the floor, but in the next shot it's back in her mouth again.

Continuity: When Father Karras visits his mother, he places his collar edge-wise on the shelf. In the next shot the collar is lying down at a different angle.

Continuity: At the movie set, Chris yells, "Hold it, hold it" as Father Karras watches and walks away. In the next shot several extras along with the line of shade behind him disappear.

Audio problem: At the end of the movie Chris calls to Father Dyer from her car and says, "I thought you'd like to keep this". If you read her lips she just says, "I thought you'd like this".

Continuity: After Burke Dennings is killed, Chris goes upstairs and finds the window in Regan's room is wide open. It's so cold that you can see the condensation from her breath in some shots, but not in others.

Continuity: As Regan spins her head around her blue nightgown is now totally clean.

Continuity: Father Merrin says, "I cast you out", and the green vomit that was around her mouth has now disappeared.

Continuity: After Chris returns home from the movie set, items on the window sill, the flowers on Sharon's desk and the pencils in her pencil holder all move inbetween the two close-up shots of her as she sits at her desk.

Continuity: As the first part of the exorcism comes to a close, Father Karras picks the blanket up off the floor and covers Regan with it. Father Merrin's red prayer book can be seen on the left night table but in the next shot it's moved and we see his crucifix there instead.

Continuity: Father Dyer runs to Chris' car at the end of the movie as we see another car coming at them and passing on their left. In the next shot that car has disappeared.

Continuity: When Damien jumps through Regan's window we can see that half of the window frame is still there. But a couple of shots later when Det. Kinderman looks through it almost all the window is knocked out.

Revealing: As Father Merrin speaks to another archaeologist in the beginning of the movie the clock on the wall stops between ticks and he turns around to look at it. It's easy to see that the clock pendulum has been pushed up against the window from behind in order to make it stop.

Continuity: Father Karras is out for an early morning jog and jogs past the same place twice as he jumps three-quarters of the track between shots.

Continuity: The long curtain on the window behind her has been noticeably moved between shots as a doctor puts Regan in a trance.

Continuity: At the end of the movie Chris calls to Father Dyer from her car and a Volkswagen beetle appears parked in front of them on the right side of the road, even though we've heard no car passing them.

Continuity: Regan sits up in bed as Father Merrin says, "By this sign of the Holy Cross" and she has no frozen vapor coming out of her mouth. In the next shot before her head spins around frozen vapor appears and can be seen all the way down to her blanket.

Revealing: As Chris walks around the attic to see what's making the noise the shadow of the candlestick appears on her face which is not possible as it's the only light source up there.

Continuity: When we first see her, Chris MacNeil lays in bed editing her script. The lamp above her head changes position between shots after she turns it on.

Revealing: Crash mats are visible on the steps, when the Father is thrown through the window and rolls down the stairs.