Jeremy Irons

Beverly Mantle / Elliot Mantle

Geneviève Bujold

Claire Niveau

Heidi von Palleske

Cary

Barbara Gordon

Danuta

Shirley Douglas

Laura

Stephen Lack

Wolleck / Anders Wolleck

Lynne Cormack

Arlene

Denis Akiyama

Pharmacist

Dee McCafferty

Surgeon

Jane Luk

Lecture-Hall Nurse

Jill Hennessy

Mimsy

David Cronenberg

Obstetrician (uncredited)

Jacqueline Hennessy

Escort Twin