Exorcist II: The Heretic with the idea of directing a sequel, explaining that "every film has to struggle to find a connection with its audience. Here I saw the chance to make an extremely ambitious film without having to spend the time developing this connection. I could make assumptions and then take the audience on a very adventurous cinematic journey." Linda Blair agreed to reprise her role of Regan MacNeil for "Exorcist II", but refused to wear demon make-up (a double was used for the brief flashback scenes depicting a demonic Regan). Max von Sydow was persuaded by Boorman to reprise the role of
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Regan begins to rapidly undergo disturbing psychological and physical changes: she refuses to eat or sleep, becomes withdrawn and frenetic, and increasingly aggressive