Exorcist II: The Heretic the Book of Job; it's God testing the good. In this sense, Regan (Linda Blair) is a modern-day saint — like Ingrid Bergman in "Europa '51", and in a way, like Charlie in "Mean Streets". I like the first "Exorcist", because of the Catholic guilt I have, and because it scared the hell out of me; but "The Heretic" surpasses it. Maybe Boorman failed to execute the material, but the movie still deserved better than it got." Author Bob McCabe's book "The Exorcist: Out of the Shadows" contains a chapter on the film in which Linda Blair said the movie
The Exorcist (novel) powerful evil, which, unknown to the reader at this point, he has battled before in an exorcism in Africa. Meanwhile, in Georgetown, a young girl named Regan MacNeil is living with her famous mother, actress Chris MacNeil, who is in Georgetown filming a movie. As Chris finishes her work on the film, Regan begins to become inexplicably ill. After a gradual series of poltergeist-like disturbances in their rented house, for which Chris attempts to find rational explanations, Regan begins to rapidly undergo disturbing psychological and physical changes: she refuses to eat or sleep, becomes withdrawn and frenetic, and increasingly aggressive