This bizarre psychological thriller from horror director David Cronenberg chronicles the perverse relationship that develops between identical-twin gynecologists with very different personalities. The twins share everything, including an apartment and a fertility clinic, but a hedonistic actress enters their lives and drives a wedge between them for the first time. Cronenberg’s study of identity, sadomasochism, narcissism, and misogyny features a deliciously virtuoso double performance by Jeremy Irons, who dispenses precise doses of black humor and camp creepiness.