Boris Karloff

Valdar

Margaret Lindsay

Helene von Lorbeer

Bruce Lester

Frank Bennett

Leonard Mudie

James Yeats

Holmes Herbert

Arthur Bennett

Austin Fairman

George Bennett

William Bailey

British Intelligence Agent

Louise Brien

Miss Risdon - Bennett's Secretary

Glen Cavender

Under Officer Pfalz

David Cavendish

Capt. Lanark

Joe De Stefani

German Officer

Carlos De Valdez

Von Ritter

Clarence Derwent

Milkman

Arno Frey

German Junior Officer

Frederick Giermann

Otto Kurtz

Terry O. Morse