Directed by: John Boorman
Starring: Max von Sydow, Richard Burton, Louise Fletcher, Linda Blair
Factual error: In the hypnosis scene, when father Marrin is crossing himself, he is doing it the wrong way - from right to left. (00:20:40)
Factual error: Father Lamont tears out the Regan doppelganger's heart from where her stomach should be. Even allowing that she's a manifestation of a demon and may not conform to human anatomy, it isn't plausible that Lamont would know to grab for her heart through her abdomen.
Visible crew/equipment: When the camera is pulling back really fast being chased by the people in Africa, its shadows can be seen multiple times on the characters and the walls.
Sharon: All the time, I longed to see her. Finally, I came back and found that when I'm with her is the only time when I'm at peace. Why would that be? I can't understand it, it frightens me.
Father Lamont: Have you tried a psychiatrist or a priest?
Sharon: I'm talking to one now, aren't I?