[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/dead_ringers_6550.jpg]]
[[caption-width-right:300:''"There's nothing the matter with the instrument, it's the body. The woman's body is all wrong!"'']]

->''"Separation can be a... terrifying thing."''
-->-- '''Dr. Beverly Mantle'''

''Dead Ringers'' is a 1988 horror drama film directed by Creator/DavidCronenberg and starring Creator/JeremyIrons.

It's a story about twin gynecologists, Elliot and Beverly [[MeaningfulName Mantle]], who run a brisk business treating infertile women. That, and they have a tendency of taking advantage of them, too. Being the more suave of the two, Elliot woos them, and when he's finished he pulls [[TwinSwitch the old switcheroo]] and pawns the unsuspecting women off onto Beverly.

One such woman is the actress Claire Niveau (Creator/GenevieveBujold), who Beverly legitimately falls for, to the point of obsession. Unfortunately, Beverly is a jangled bundle of neuroses, and when Claire goes out of town to work on a film and Bev calls her hotel room only for a man to answer, Beverly jumps to the conclusion that she is cheating on him.

[[SanitySlippage Cue descent into delusional hell]], wherein Beverly begins [[MadDoctor performing unnecessary operations]] with [[CowTools custom gynecological tools]] on women who he believes have "mutant genitalia." When the effects of his declining mental health spill over into the brother's practice, the board of health suspends Beverly's license. Elliot, who had always been sensitive to his sibling's fragility, leaves his practice and his current sex partner to join Beverly, who has holed himself up in their apartment.

The twins then embark on a medical procedure to separate themselves for health reasons. Has it been mentioned that they ''aren't'' conjoined twins?

The film is set to be remade into a [[Series/DeadRingers2023 television series]] for Creator/PrimeVideo on April 21, 2023, with Creator/RachelWeisz taking over the role(s) of Elliot and Beverly.

Not related to the British television and radio series ''Series/DeadRingers''. Also not to be confused with ''Film/DeadRinger'', an entirely different identical twin story starring Creator/BetteDavis.

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!!This film operates on the following tropes:
* ActingYourIntellectualAge: The twins as children, who act almost nothing like children at all and much more like little scientists.
* AddledAddict: Beverly's drug use leads to erratic behavior, delusions, and visibly deteriorating physical health.
* AlwaysIdenticalTwins: Beverly and Elliot are identical twins, played by the same actor, Creator/JeremyIrons.
* AngstySurvivingTwin: At the end, [[spoiler:Beverly kills his brother with surgical tools at the latter's request in a drug-fueled stupor. He doesn't outlive his brother for long, as he simply can't bear to live without him and instead chooses [[TogetherInDeath to die with Elliot]].]]
* BedTrick: Elliot seduces women, then hands them over to Beverly once he's tired of them, without the women knowing they're sleeping with two different men.
* BerserkButton: Don't call attention to the fact that Beverly is usually a woman's name.
* BodyHorror: A Cronenberg staple.
** The NightmareSequence.
** The [[CowTools medical instruments]].
** A disturbingly subtle one for what's ''not'' shown is Beverly's diagnosis of Claire; the reason she can't get pregnant is because she has one uterus with three separate uterine compartments, each with its own cervix. When Beverly calls Claire at her hotel room while she's away working on a film and gets her (male) receptionist, he believes she's cheating on him -- and tells him about her condition. Claire's actually a good sport about it. She's already accepted Beverly's neuroses and is less disturbed by the confidentiality breach than she is by her receptionist's reaction -- he was a FlamboyantGay ''before'' Beverly accused him of "fucking a mutant," which grossed him out beyond belief.
* CatapultNightmare: Beverly falls from his bed after a NightmareSequence where Claire separates him from his brother Elliot by chewing through the connective tissue.
* ChainedHeat: Appropriately enough, Claire's character [[ShowWithinAShow in a movie she's rehearsing for]] is in this situation.
* ChildProdigy: Bev and Ellie as kids are already extremely knowledgeable about sex, reproduction, evolution, and anatomy.
* CowTools: Beverly's custom-made gynecological instruments are shown on display, and they are quite nasty looking, but (''thankfully'') their utility is never made explicit.
* DaydreamSurprise: Beverly is sleeping with Claire. Elliot is there next to the bed, and Claire suggests to separate Beverly from Elliot. Then she starts biting a sort of umbilical cord-like growth that links the twins together. Cut to Beverly waking up; this was just a nightmare.
* DescentIntoAddiction: After meeting Claire, Beverly becomes addicted to meds. His brother finally follows suit.
* DrivenToSuicide: Beverly kills himself in the end.
* DrJerk: Both brothers take turns at this. Elliott is shown as contemptuous and dismissive towards his patients, and Beverly later becomes furious with a patient who dares to suggest his examination is hurting her.
* EvilTwin: Zig zagged. In the beginning, Elliot is presented as a smooth and charming but totally sociopathic jerkass, while Beverly seems to be a rather NiceGuy in contrast with his brother (even if using a BedTrick is clearly not something nice). In the end, Beverly becomes a MadDoctor and Elliot is the more sensible and less dangerous of the two.
* {{Foreshadowing}}: The gynecological instrument that Beverly designs when he is still an undergraduate student foreshadows the instruments that he designs in the end.
* FromTheMouthsOfBabes: Ellie and Bev as kids, who know far more about adult topics than anyone would expect from children, and it's played for laughs when they ask another young girl quite baldly if she'd be interested in having sex with them.
* GenderBlenderName:
** Claire points out that ''Beverly'' is considered a feminine name.
** Beverly calls his brother by a feminine-sounding nickname: "Ellie."
** While Claire is more common as a woman's name, it can be a male name as well (Clare).
* IWasToldThereWouldBeCake: Perhaps surprisingly, the eating of a delicious cake is an integral part to TheClimax.
* {{Identical Twin ID Tag}}s: As the story progresses, Beverly and Elliot's personalities diverge due to one of the twins' advancing mental instability. This is reflected in their appearance, with Elliot maintaining a healthy, well-tanned look while Beverly develops bags under his eyes, a sickly pallor, and a nervous twitch. Even in earlier parts of the story, Beverly is sometimes recognizable by his stooped posture, something Elliot never exhibits.
* LawOfInverseFertility: The Mantle twins treat infertile women who want to conceive. Claire is one of them.
* LittleProfessorDialog: The twins as kids speak far more scientifically than most children that age.
* MadDoctor: Beverly, after his mental decline.
* ManlyManAndSensitiveGuy: Elliott is suave, seduces women easily, and not a little hard-hearted towards everyone but his brother. Beverly is shy, awkward, and cries easily. However, the roles get more muddied as the movie goes on.
* MarketBasedTitle: The original name of the film was ''Twins'', but it had to be changed thanks to [[Film/Twins1988 the Schwarzenegger/DeVito film]] coming out first.
* AMinorKidroduction: In the prologue, the Mantle brothers are young boys who already discuss about sex and gynecology.
* MistakenForCheating: Beverly thinks that Claire is cheating on him because a male coworker answers a phone call to her hotel room. She was just having a professional meeting in her room.
* NailedToTheWagon: When Beverly's AddledAddict tendencies start to threaten Elliot's career, Elliot locks him away to detox in private.
* NightmareSequence: There's one in the middle of the film and it is pretty...[[BodyHorror disturbing]]. Beverly is sleeping with Claire. Elliot appears next to the bed and Claire suggests to separate Beverly from Elliot. Then she pulls the covers back to reveal Bev and Ellie are connected by a fleshy growth between their stomachs, and Claire starts ripping it off ''with her teeth''.
* NonNudeBathing: Toward the end of the movie, Beverly comes across Elliot in the midst of his own breakdown, sitting in the shower, fully clothed.
* PingPongNaivete: The twins as children know an awful lot about sex, reproduction, evolution, and anatomy, and yet know nothing of social boundaries and even have some of their notions about sexual evolution wrong. They think if humans were an underwater creature we wouldn't have sex and instead lay eggs for males to fertilize like fish do, but humans are mammals, and underwater mammals like dolphins and whales do have sex.
* PolarOppositeTwins: Elliot is smooth and a ladykiller while Beverly is a ShrinkingViolet. They are so identical that the only way Beverly can have sex is for Elliot to seduce the woman [[BedTrick then substitute Bev for himself at the very last moment in the bedroom]].
* QuickNip: All three of the central characters pop pills at various points in the narrative. Of particular note is a scene of Elliot, as he waits for an elevator, coolly and systematically dipping into an almost comically long series of prescription bottles he keeps in his pockets.
* ReallyGetsAround: Claire says that she does everything she can to get pregnant, like being extremely promiscuous.
* SanitySlippage: Because of his addiction to meds, his insecurity, and his difficulty to live independently from his brother, Beverly becomes increasingly insane. He begins seeing genital mutations in his patients that do not actually have any. [[spoiler:The madness spreads to Elliot via [[{{Synchronization}} twin osmosis.]] This leads to them using a sort of strangely designed scalpel to perform a "separation procedure", AKA a murder-suicide]].
* SiblingTriangle: Claire has a relationship with both Beverly and Elliot. She is not aware of it, since her lovers are identical twins and Elliot pretends to be Beverly when he meets her.
* SpiritualAntithesis: To the film Cronenberg made immediately before this, ''Film/TheFly1986''. Both are adapted from written works. Each is a PsychologicalThriller {{Tragedy}} with only a few significant characters in which a man's jealous love for a woman inadvertently sends him into SanitySlippage. Both involve extensive special effects and a lead actor ''seriously'' committed to their performance on physical and mental levels. But where ''The Fly'' is a science fiction film involving a transformation into both a HalfHumanHybrid and MadScientist with extreme amounts of onscreen BodyHorror, this is a more realistic story of someone who becomes a MadDoctor and BodyHorror is more suggested than shown (with only one exception in a nightmare sequence). Where ''The Fly'' involves two entities (the scientist and a housefly) merging into one with the special effects turning Creator/JeffGoldblum into that creature, this involves two entities trying to separate themselves -- the twin doctors -- with special effects allowing Creator/JeremyIrons to play both. The visuals, acting, and tone are icy and chic here, whereas ''The Fly'' is warmer and dowdier. Whereas The Fly involves a man going through an external, physical transformation into a monster, Dead Ringers involves a man going through an internal, psychological transformation into a monster, and each ends up with an apartment full of trash and half-eaten food as an environmental sign of their SanitySlippage. The trailer actually positioned it as this trope in its narration (and used RecycledTrailerMusic from its precursor): "From David Cronenberg, who in ''The Fly'' made the fantastic real...now, David Cronenberg makes reality the ultimate fantasy."
* TogetherInDeath: A particularly wrenching example. [[spoiler:When the twins reach the nadir of their breakdown, they perform a "surgery" where Beverly effectively eviscerates Elliot. After he realizes what he's done, Beverly makes one final, abortive attempt to connect with his new paramour. He instead decides to join Elliot in death, cradling his brother's body as he dies.]]
* TrashOfTheTitans: The twins' private hospital is full of trash in the end, because [[SanitySlippage they have become insane]].
* TroubledFetalPosition: Beverly does the "rocking back and forth" variation at one point.
* TroublingUnchildlikeBehaviour: The film begins with a flashback to Elliot and Beverly as 9-year-old children, discussing the evolutionary basis for sexual reproduction in humans. It works as an EstablishingCharacterMoment for how connected Elliot and Beverly are to one another yet completely at odds with the rest of society and culminates in one of the few funny moments in the film:
-->'''Elliot''': Raffaella, [[ItMakesSenseInContext will you have sex with us in our bathtub]]? [[ForScience It's an experiment]].
-->'''Raffaella''': Are you kidding?! [[FromTheMouthsOfBabes Fuck off, you freaks]]! I'm telling my father you talk dirty. Besides, I know for a fact you don't even know what a fuck is. ''*storms off*''
-->'''Elliot''': They're so different from us. And all because we don't live under water.
* {{Twincest}}: The interactions and dependency of the brothers seem to have this sort of subtext, sharing details about their sex lives as if comparing homework. TruthInTelevision in that many twins are emotionally and physically intimate in ways disturbing to the untwinned, but the brothers take it well beyond that, especially on Elliot's end, like when he tries to initiate a threesome with Beverly and gets protective and takes over when his brother needs CPR.
* TwinSwitch: The Mantle twins do it regularly with the women they date. As far as Claire is concerned, she first meets Beverly during a consultation, then she has a date with Elliot and has sex with him. Her next date is with Beverly who has sex with her too...and Claire thinks that she is always with the same person. She does not even know that Beverly has a twin brother.
* TwinThreesomeFantasy:
** Elliot orders up an evening of "entertainment" with a pair of high-class twin hookers called Coral and Mimsy. Taking it even further, he requests that one of them call him by his own name, and the other call him by his brother's name...
** In a later scene, Elliot's girlfriend tries to initiate a threesome with him and Beverly. Elliot seems totally into it, but Beverly is way too uncomfortable.
* VeryLooselyBasedOnATrueStory: Cronenberg based the film on the deaths of [[http://en.wikipedia.org/wiki/Stewart_and_Cyril_Marcus Stewart and Cyril Marcus]]. However, the Marcus twins were "just" a pair of gynecologists who shared a practice, an apartment, a drug addiction, and were both found in said apartment some time after they died of withdrawal, resulting in them looking like rotten beef jerky - and no one really knows ''what'' the hell actually happened. Cronenberg, being Cronenberg, decided that all of this wasn't creepy '''enough...'''
* WardrobeFlawOfCharacterization: In the scene where a drunken Beverly embarrasses Elliot at an awards ceremony, look at the ties. Elliot is wearing a perfectly-tied bow tie; Beverly, as though to highlight his ineffectualness, is wearing a clip-on.
* WiseBeyondTheirYears: Elliot and Beverly as kids, as they discuss evolution, sex, anatomy, and reproduction.
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