1963 drama directed by Creator/SamuelFuller.

Johnny Barrett (Peter Breck), an ambitious journalist, is determined to win a Pulitzer Prize by solving a murder committed in a lunatic asylum and witnessed only by [[RuleOfThree three]] inmates, from whom [[PoliceAreUseless the police have been unable to extract the information]]. With the connivance of a [[TheShrink psychiatrist]], and the reluctant help of his girlfriend Cathy (Constance Towers), he succeeds in having himself declared insane and sent to the asylum. There he slowly tracks down and interviews the witnesses - but things are stranger than they seem ...

!!This film provides examples of:

* BedlamHouse: The asylum has this dysfunctional feel to it.
* BittersweetEnding / DownerEnding: [[spoiler: Johnny solves the mystery, the murderer is caught, and Johnny gets his Pulitzer. But his obsession leads to his mentally snapping--he is now catatonic, and a patient at the asylum. And there seems to be no hope for Cathy reconciling with him.]]
* BoomerangBigot: Trent, as a self-proclaimed black Klansman.
* CannotSpitItOut: Johnny's speaking impairment in critical situations as a result of the electroshock therapy.
* CatapultNightmare: Trent is performing one of these.
* DoubleStandardRapeFemaleOnMale: Averted. Johnny is traumatized by the nymphomaniacs' advances.
* DrivenToMadness: TheMovie.
* ElectricTorture: The electroshock treatment Johnny is been given.
* EnthrallingSiren: The nymphomaniacs use the songs "My Bonnie" and "Java Jive" as siren songs.
* {{Fanservice}}: Cathy's song number in a skimpy Vegas show-girl outfit.
* FatBestFriend: The gigantic opera singer instantly befriends Johnny.
* FlippingTheTable: Happens during the dispute at the canteen.
* GeniusDitz: Dr. Boden, a brilliant nuclear scientist, has regressed to the mental level of a six-year old, spending his time drawing crude childish pictures and playing hide-and-go-seek.
* GoAmongMadPeople: Johnny.
* InnerMonologue: Johnny's thoughts are the main narrative.
* IrisOut: The movie starts with an Iris-In effect on the long asylum corridor.
* LoveMakesYouCrazy: Cathy's crazy love for Johnny.
* NapoleonDelusion: Stuart believes that he's UsefulNotes/AmericanCivilWar general J. E. B. Stuart.
* OrderliesAreCreeps: Wilkes anyway.
* PunctuatedPounding: Who! Killed! Sloan! (Johnny pounding Wilkes' head on the floor)
* PunishmentBox: Johnny is threatened by the warden to receive this treatment.
* TheReasonYouSuckSpeech: In the opening scene, Cathy is giving one of these to Johnny concerning his obsession.
* RoomFullOfCrazy: A mild version with the drawings in the Nympho ward.
* SanitySlippage: Johnny's losing it towards the end, becoming a legit inmate of the asylum.
* SelectiveObliviousness: Pagliacci views everything as an opera, often imitating the movements of an orchestral conductor around the other inmates. When Johnny screams during a panic attack, Pagliacci mistakes it for a sour note.
* ShoutOut: Music/JohnZorn's album ''Music/{{Radio}}'' has a track called "Shock Corridor".
* SplashOfColor: While the movie is produced in black and white, the nightmares/visions of the characters are depicted in color.
* TalkativeLoon: Trent in particular.
* WhereDaWhiteWomenAt: Trent mentions this twice in his hate speeches.
* YouHaveToBelieveMe: Johnny, trying to convince the shrink of his sanity.