William Peter Blatty ("The Exorcist") writes and directs this taut, off-beat psychological thriller starring Stacy Keach ("Mike Hammer") as a straight-laced, by-the-book Marine psychiatrist who comes to help treat a group of insane ex-GIs kept imprisoned in an old castle. Keach and the off-the-wall resident physician (Ed Flanders, "St. Elsewhere") are in charge of keeping the inmates under control, but everyone soon learns that the psychiatrist may be crazier than all the inmates combined, as an intricate plot of identity and intrigue emerges. Also starring Moses Gunn ("Heartbreak Ridge"), Robert Loggia ("Big") and Alejandro Rey ("The Flying Nun"). Leonard Maltin calls this film "hilarious yet thought-provoking, with endlessly quotable dialogue." People Magazine calls it "the finest large-scale American surrealist film ever made." Nominated for three Golden Globe Awards (including Best Picture) and winner for Best Writing.