Vincent Price
as François Delambre
Eugene Borden
as Dr. Ejoute (uncredited)
Charles Herbert
as Philippe Delambre
Kathleen Freeman
as Emma (Delambre maid)
Betty Gerson
as Nurse Andersone
Charles Tannen
as Doctor (uncredited)
Patricia Owens
as Helene Delambre
Herbert Marshall
as Insp. Charas
Al Hedison
as Andre Delambre
Torben Meyer
as Gaston (uncredited)
Harry Carter
as Orderly (uncredited)
Franz Roehn
as Police doctor (uncredited)
Arthur Dulac
as French waiter (uncredited)