Shock Corridor is a 1963 film, directed and written by Samuel Fuller. The film tells the story of a journalist who gets himself committed to a mental hospital in order to track an unsolved murder.
Peter Breck plays journalist Johnny Barrett, who thinks the quickest way to a Pulitzer Prize is to uncover the facts behind a murder at a mental hospital. So, he pretends to go insane and is locked up in the institution. While pursuing his investigation, he is sidetracked by the behavior of his fellow inmates. The three witnesses to the murder have all become insane owing to the stress of confronting American bigotry and war. After a hospital riot, Barrett is straitjacketed and subjected to shock treatment. Barrett begins imagining that his exotic-dancer girlfriend (Constance Towers) is his sister, and experiences many other symptoms of mental breakdown. He learns the identity of the killer, and writes his story, but the damage to his mind is irreparable, and he never leaves the hospital.