Michael Redgrave

David Charleston

Barbara Mullen

Ellen Kirby

James Mason

Streeter

Lilli Palmer

Melanie Kurtz

Finlay Currie

Capt. Joshua Stuart

Frederick Valk

Dr. Kurtz

Sybille Binder

Anne Marie

Barry Morse

Robert

George Carney

Harry

Miles Malleson

Chairman of Directors

Bryan Herbert

Flanning

A.E. Matthews

Mr. Kirby

Olive Sloane

Woman Director

Tommy Duggan

Office Clerk

Gerard Heinz

Dr. Hartmann (uncredited)

Vi Kaley

Old Woman in Cell (uncredited)

Andreas Malandrinos

Italian Police Chief (uncredited)

Arnold Marlé

President of the Medical Society (uncredited)

Victor Rietti

Doctor (uncredited)

Milo Sperber

Mr. Hirohiti (uncredited)