Margot Kidder
Danielle Breton / Dominique Blanchion
Jennifer Salt
Grace Collier
Charles Durning
Joseph Larch
William Finley
Emil Breton
Lisle Wilson
Phillip Woode
Barnard Hughes
Arthur McLennen
Mary Davenport
Mrs. Collier
Dolph Sweet
Detective Kelly
Olympia Dukakis
Louise Wilanski
Catherine Gaffigan
Arlene
Cathy Berry
Lobster child (uncredited)
Art Evans
African Room Waiter (uncredited)
Justine Johnston
Elaine D'Anna (uncredited)
James Mapes
Guard (uncredited)
Laun Maurer
Druggist (uncredited)
Bob Melvin
Extra (uncredited)
Burt Richards
Hospital Attendant (uncredited)