Robert Stack as Dr. Donovan MacLeod

Polly Bergen as Lorna Melford

Joan Crawford as Lucretia Terry

Janis Paige as Marion

Diane McBain as Alison Horne

Van Williams as Dr. Larry Denning

Sharon Hugueny as Connie

Herbert Marshall as Dr. Jubal Harrington

Ana María Lynch as Ana

Constance Ford as Nurse Bracken

Robert Vaughn as Jim Melford

Quinn O'Hara as Beautiful Woman

Ellen Corby as Irene

Virginia Munshin as Ruth

Barbara Barrie as Edna