Dead Ringers (1988) is a psychological horror film directed by David Cronenberg.
Inspired by true events, the film stars Jeremy Irons in a dual role as Elliot and Beverly Mantle, identical twin gynecologists. Elliot, the more aggressive of the two, seduces women who come to the Mantle Clinic. When he tires of them, he passes them on to the shy and passive Beverly, without informing them.
When Beverly becomes attached to a troubled actress (played by Genevieve Bujold), it upsets the equilibrium between the twins. The actress' rejection of Beverly sends him into depression, prescription drug abuse and delusions about "mutant women" with abnormal genitalia. Their codependent relationship pulls Elliot down as well.
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