''Les Diaboliques'' (''The Devils''), also known as ''Diabolique'', is a [[UsefulNotes/{{France}} French]] suspense-thriller made in 1955 and directed by Creator/HenriGeorgesClouzot.

Christina and Nicole, respectively the wife and [[TheMistress mistress]] of Michel the JerkAss school headmaster, conspire to kill him. However, after they carry it out, his body disappears, and then things just get weirder. Christina and Nicole are played by Creator/VeraClouzot and Creator/SimoneSignoret

Rumpled, folksy detective Fichet was the inspiration for ''Series/{{Columbo}}''.

[[ForeignRemake Remade in the U.S.]] as ''Diabolique'' in 1996, with Creator/SharonStone as Nicole the mistress, Creator/IsabelleAdjani as Mia the wife, Creator/ChazzPalminteri as the brutish husband, and Creator/KathyBates in a GenderFlip role as the police detective.

!!This movie contains examples of:

* AssholeVictim: Michel, with so much emphasis on "asshole" that the "victim" part almost fades in comparison. [[spoiler:Subverted eventually, as the ending reveals that he has been alive and working together with Nicole the whole time. Double subverted when Alfred Fichet catches them both and arrests them]].
* ChekhovsSkill: [[spoiler:Michel is referred to as a former champion swimmer, which allowed him to hold his breath long enough to make the drowning seem real.]]
* CutHimselfShaving: Nicole gives a lame excuse for a black eye that was apparently caused by Michel.
* DisposingOfABody: Or appearing to, anyway.
* DoNotSpoilThisEnding: Translated from French, the final title card after the film reads:
-->Don't be diabolic yourselves! Don't ruin the interest your friends could take in this film. Don't tell them what you saw. On their behalf, we thank you.
* EmptyPilesOfClothing: The women freak out when the suit Michel was drowned in [[spoiler:is returned to the school from a dry cleaners.]]
* TheEndingChangesEverything: [[spoiler:The whole movie is a plot by Michel and Nicole to kill Christina. She has a weak heart, which they use to frighten her to death.]]
* FakingTheDead: [[spoiler:Michel wasn't dead at all. It was a trick to fool Christina.]]
* FocusGroupEnding: The remake completely changes (and arguably ruins) the ending. [[spoiler:Mia doesn't die, Nicole panics, and in the end Mia and Nicole drown Guy (the husband) in the pool, for real. The detective then helps them cover it up.]]
* {{Foreshadowing}}: Early scenes establish that 1) Christina has a lot of money of her own, and 2) she has a heart condition.
* FrightDeathTrap: [[spoiler:Christina, driven wild by fright, has her fatal heart attack after Michel rises from the tub.]]
* {{Gaslighting}}: [[spoiler:Nicole and Michel are plotting to drive Christina mad with fear.]]
* GenderFlip: Kathy Bates as the Fichet-{{Expy}} in the 1996 remake.
* HollywoodHeartAttack: Averted. [[spoiler:The fatal heart attack at the end is ''disturbingly'' realistic]].
* HomoeroticSubtext: The film implies that Christina and Nicole are lovers -- one scene shows them in the same room in pajamas, and later they speak of running away together. This is never expressly portrayed or stated, however; there were some things you just couldn't do in 1955, even in France.
* MaybeMagicMaybeMundane: In the last scene, a kid claims to [[spoiler:have talked to Christina, who died from a heart attack earlier]]. The boy is noted to be a notorious liar, but he was right when he said that [[spoiler:he saw Michel earlier in the movie]]. So is he lying, or has he really [[spoiler:seen a ghost? Or did Christina survive her attack, just like Michel faked his death?]]
%%* MindScrew
* NothingIsScarier: The tension when Christina is wandering through the deserted halls of the school at night, looking for Michel, is incredible.
* NotQuiteDead: Possibly. The film hints that [[spoiler:the wife might have ''survived'' her heart attack. (Or that the kid saw her ghost. Or that the kid is a liar.)]]
* ObfuscatingStupidity: Fichet, the detective, employs a bit of this. (More than one observer has noted the character's similarity to Series/{{Columbo}}.)
* PoliceAreUseless: It's good that Fichet heard [[spoiler:Michel and Nicole discussing their plot]], but it would have been better if he'd stepped up before [[spoiler:Christina keeled over and died]].
* RapeDiscretionShot: The film implies that Michel rapes Christina after the dinner with the fish.
* ReverseWhodunnit: What happened to Michel's body? What's going on?
* ScreamingWoman: Christina, when the lights go out just after she finds Michel's name written over and over on the typewriter during the climax.
* SpookyPhotographs: Michel's ghostly face appears in the class portrait.
* TwistEnding: [[spoiler:Michel and Nicole have been in cahoots all along.]]
* WouldHitAGirl: Michel slaps Christina after she spills alcohol on his suit -- it's drugged, and she was trying to stop him from drinking it. She then [[LaserGuidedKarma goes ahead and lets him drink]].