Director David Cronenberg based this controversial and stylish psychological horror on a bizarre true story... Jeremy Irons delivers a disturbing performance as twin Gynaecologists Elliot and Beverly Mantle. Intrigued by the mysteries of sex and anatomy, the brothers grow from inseparable playmates to world-renowned specialists. Sharing their women, Elliot and Beverly seem inseparable. The entrance of Claire (Bujold), an actress seeking fertility treatment, changes their relationship forever. Both twins seduce her but shy, sensitive Beverly falls in love and attempts to break free from his charming brother with catastrophic consequences.