Belief in evil. Belief that evil can be cast out. From these two strands of faith, author William Peter Blatty and director William Friedkin wove The Exorcist, the frightening and realistic story of an innocent girl inhabited by a malevolent entity. This is the terrifying tale of her mother's frantic resolve to save her and two priests - one doubt-ridden, the other a rock of faith - joined in battling ultimate evil. Winner of 1973 Oscars for Best Adapted Screenplay and Best Sound Mixing, The Exorcist remains one of the most shocking and gripping movies in the history of cinema and is a regular feature on lists of the scariest movies ever made.