This finely wrought urban horror tale from director David Cronenberg was inspired by the true story of identical twin gynaecologists who were found dead on New York's Upper East Side in 1975. Here, with the setting transposed to Toronto, Jeremy Irons expertly plays both Beverly and Elliot Mantle, with Geneviève Bujold as the internationally famous but infertile actress who, quite literally, can't choose between them. At the time, Cronenberg was better known for more gory offerings like Videodrome and the 1986 remake of The Fly, but here he demonstrates a uniquely distressing and subtle talent, and the result is enough to put you off visiting fertility clinics for ever.

Elliot, a successful gynecologist, works at the same practice as his identical twin, Beverly. Elliot is attracted to many of his patients and has affairs with them. When he inevitably loses interest, he will give the woman over to Beverly, the meeker of the two, without the woman knowing the difference. Beverly falls hard for one of the patients, Claire, but when she inadvertently deceives him, he slips into a state of madness.