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''Deep Red'' (or ''Profondo Rosso'') is a {{Giallo}} movie from Creator/DarioArgento and, alongside ''Film/{{Suspiria}}'', considered his greatest work.

The story follows the main character, the music teacher Marcus Daly (Marc) who witnesses the brutal murder of a psychic medium, Helga Hulmann and, despite failing to rescue her, catches a glimpse of the killer. With the help of a reporter, Gianna, his best friend Carlo and Dr. Giordani, an associate of Helga, he tries to uncover this mysterious killer and stop him before he kills again.

The film was very popular not only in Italy, but also in Britain and America (whose version however is cut and shorter) and even in Japan, where it's known as "Suspiria 2".
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!!Deep Red contains examples of:

* TheAlcoholic: Carlo.
* TheAllegedCar: Gianna's car. It's amazing that it can still move, and in order to exit from it they must pass from the rooftop.
* AmateurSleuth
* AxCrazy: The killer. Bonus point for actually using a cleaver.
* AxeBeforeEntering
* BigDamnHeroes: [[spoiler: Offscreen: when Marc is knocked senseless and left to die in the burning House of the Screaming Child, Daria brings him to safety.]]
* {{Bowdlerised}}: The US version decided to cut all the romantic subplots, the funny scenes and also many bits from the murders. Of course, those cut were minimal, so the film is not too short.
* CatScare: Or rather, Bird scare... and the poor things get ImpaledWithExtremePrejudice to boot.
* CreepyChild: Olga, the daughter of the abandoned house keeper. Among various things she has impaled a lizard [[KidsAreCruel with a needle, and the poor beastie is still alive]]
* DeadManWriting: The second victim, Amanda, manages to write the name of the killer on the humid walls, and later Dr. Giordani manages to read it.
* DemonicDummy: After Giordani hears the "Killer tune", a [[UncannyValley nightmarish]] mechanical puppet rushes into the room [[EvilLaugh giggling]]. After a brief pause, he cracks its head open with the knife.
* DesignatedLoveInterest: Gianna to Marc.
* TheDitz: Martha, Carlo's mother. [[spoiler: {{Not So Harmless|Villain}} as she seems....]]
* DolledUpInstallment: In Japan, the film was released as "Suspiria 2", despite being unrelated (and filmed several years before Suspiria)
* DudeLooksLikeALady: Carlo's lover. If it weren't for his bare chest, he could have passed for a woman.
* EarlyBirdCameo: It's actually possible to see the killer (and spoil the movie) if you're really careful. [[spoiler: The second time you watch the movie you'll know why.]]
* EvilSoundsRaspy: The killer's threat to Marc is delivered in a raspy voice. [[spoiler:But the killer's voice is normal when her identity is revealed.]]
* FamilyUnfriendlyDeath: All the victims:
** Helga is chopped and stabbed to death with a large knife.
** Amanda is brutally beaten and drowned in a tub of hot water.
** [[spoiler: Giordani is brutally beaten to a pulp, has his teeth smashed against a corner of the piano and is stabbed in the neck.]]
** [[spoiler: Carlo.]] See also HumiliationConga
* GenreSavvy: When Marc hears the "killer tune" at the beginning he has the common sense to call for help and lock the doors. Also Giordani, who decides to pick up a large, curved dagger in order to protect himself. [[spoiler: It doesn't work.]]
* GeniusBruiser: Giordani, who keeps a curved dagger nearby, ready for use.
* {{Giallo}}
* HandOfDeath
* HauntedHouse: "The House of the Screaming Child". It's just old, abandoned and creepy though. [[spoiler: Uh, and the killer and her family lived here, why do you ask?]]
* HiddenInPlainSight: [[spoiler: At the beginning, Marc sees the face of the killer in a portrait/mirror. It's a blink-and-you-miss-it moment.]]
* HoistByHisOwnPetard: [[spoiler: Giordani is finished off by his own knife and Martha is beheaded by her own necklace caught in a descending lift.]]
* HorrorDoesntSettleForSimpleTuesday: The film opens on Christmas.
* HumiliationConga: A tragic one: [[spoiler: Carlo flees from the police, falls from a high wall, hurting his leg, then is hit and stunned by a truck's rearview mirror, gets caught in said truck, is dragged along the street, hit his head and finally, when it stops, he has his head ''squished'' by the wheel of a car.]]
* IllKillYou: A creepy threat from the killer to Marc near the beginning.
-->'''Killer''':" You won't get away from me, I'll kill you sooner or later!"
* IntrepidReporter: Gianna.
* IronicNurseryTune: A major cause of ParanoiaFuel
* KillItWithFire: [[spoiler: Carlo burns the House of The Screaming Child in order to cover the evidence of his father's death.]]
* KnifeNut: The killer.
* MommasBoy: Carlo.
* NightmareFuelColoringBook: First a wall picture and then a drawing [[spoiler: From Carlo, representing the moment when his mother murdered her husband who was going to send her to a clinic.]]
* [[spoiler: ObfuscatingStupidity: Marta, but it doesn't cover intelligence but rather utter madness.]]
* OffWithHisHead: [[spoiler: Marta's horrorific doom, complete with GoryDiscretionShot]]
* PoliceAreUseless: Played with. One scene shows that a good portion of the police department is on strike, forcing Marc and Daria to investigate on their own!
* PsychicPowers: The first victim had them.
* RedHerring: Olga. [[spoiler: Also Carlo.]]
* SerialKiller
* [[spoiler: StepfordSmiler: Under that ditzy face and mannerism, Marta hides the twisted mind of a psychotic killer.]]
* TapOnTheHead: Used both on [[spoiler: Marc]] and later [[spoiler: Daria]]. While they both survive, they take some time to fully recover and the latter has to spend some time in a hospital.
* [[HeKnowsTooMuch They Know Too Much]]: The reason why so many people meet a gruesome end.
* [[LockedRoomMystery Walled Up Room Mystery]]: Inside the abandoned house. [[spoiler: It's the room where Carlo's father was killed, complete with the rotting corpse.]]
* WholesomeCrossdresser: Carlo's "friend" Massimo. And is probably one of the nicest people in this movie.
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