Peter Collinson Director Jacqueline Bisset Helen Mallory Actor Christopher Plummer Dr. Joe Sherman Actor Sam Wanamaker Lt. Fields Actor John Phillip Law Steven Sherman Actor Mildred Dunnock Mrs. Sherman Actor Gayle Hunnicutt Blanche Actor John Ronane Dr. Rawley Actor Ronald Radd Oates Actor Sheila Brennan Mrs. Oates Actor Elaine Stritch Nurse Actor Christopher Malcolm Policeman Actor Heather Lowe Heather Actor Peter Shaw Producer