A visiting actress in Washington, D.C., notices dramatic and dangerous changes in the behavior and physical make-up of her 12-year-old daughter. Meanwhile, a young priest at nearby Georgetown University begins to doubt his faith while dealing with his mother's terminal sickness. And, book-ending the story, a frail, elderly priest recognizes the necessity for a show-down with an old demonic enemy.
Max von Sydow....Father Merrin
Lee J. Cobb....Lt. William Kinderman
Kitty Winn....Sharon Spencer
Jack MacGowran....Burke Dennings
Jason Miller....Father Karras
Linda Blair....Regan MacNeil
Mercedes McCambridge....Demon (voice)
William O'Malley....Father Dyer (as Reverend William O'Malley S.J.)
Barton Heyman....Dr. Klein
Peter Masterson....Dr. Barringer - Clinic Director (as Pete Masterson)
Robert Symonds....Dr. Taney
Filmography links and data courtesy of The Internet Movie Database.