The Exorcist

Actress Chris MacNeil is living on location with her 12-year-old daughter Regan. Regan begins acting strangely, including making mysterious noises, stealing, constantly using obscene language and exhibiting abnormal strength. Father Damien Karras is convinced that Regan is possessed and decides to perform an exorcism. The experienced Merrin is selected for performing the actual exorcism with Karrassas present to assist. Both priests witness Regan perform a series of bizarre, vulgar acts and confine her to her bedroom. They attempt to exorcise the demon, but a stubborn Pazuzu toys with them.