David Hedison

Andre Delambre

Patricia Owens

Helene Delambre

Vincent Price

François Delambre

Herbert Marshall

Insp. Charas

Kathleen Freeman

Emma

Betty Lou Gerson

Nurse Andersone

Charles Herbert

Philippe Delambre

Eugene Borden

Dr. Ejoute (uncredited)

George Calliga

Club Member (uncredited)

Harry Carter

Orderly (uncredited)

Bess Flowers

Audience Member (uncredited)

Torben Meyer

Gaston (uncredited)

Sol Murgi

Audience Member (uncredited)

George Nardelli

Detective (uncredited)

Charles Tannen

Doctor (uncredited)