[[caption-width-right:350: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.''

''Dead Ringers'' is a 1988 [[BodyHorror body horror]] film by Creator/DavidCronenberg 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 them unsuspecting off onto Beverly.

Getting Elliot's sloppy seconds begins to tire Beverly, and he sets out to get a woman on his own. He makes the big personal leap of dating an actress he's taken a fancy to. Unfortunately, Beverly is a jangled bundle of neuroses, and when he sees the girl he's set his eyes on meeting with a coworker, Beverly jumps to the conclusion she is cheating on him.

[[ThroughTheEyesOfMadness 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 love interest 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?
!!This film operates on the following tropes:

* CanadaEh: Toronto is given as the setting for the majority of the film (with the exception of one scene near the beginning set in a university in America). A fairly realistic depiction without any stereotypes. Also Geneviève Bujold is actually French-Canadian, though it is not explicitly stated if her character Claire is as well.
* 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.
* {{Dramatization}}: 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 withdrawl, 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...'''
* 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 personalities diverge due to one of the twin's 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.
* MadDoctor: Beverly, after his mental decline.
* ThroughTheEyesOfMadness: Starts with Beverly, who begins seeing genital mutations in his patients that may not really exist. [[spoiler:But the madness spreads to Elliot via [[{{Synchronization}} twin osmosis.]] This leads to them using a scalpel to perform a "separation procedure", AKA a murder-suicide]].
* TroubledFetalPosition: Beverly does the "rocking back and forth" variation at one point.
* 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.