Dr. Michael Malthus / Dr. John Malthus [billed as Rock Madison]
Fernando Casanova
Beth
Sonia Furió
Nurse Janey, on phone
Ann Wells
George Todd
Willard Gross
Mrs. Roger Vernon
Katherine Victor
Det. Lt. Ed Jamieson
Robert Christopher
Detective Sergeant
Fred Hoffman
Frieda the Maid, a victim
Aurora Alvarado
Miss Benson, a victim
Rosa Maria Gallardo
19th Century Police Inspector
Bruno VeSota
Mr. Simms
Lloyd Nelson
Masseur
Chuck Niles
Director of Photography
Jerry Warren
Director
Writer