On screen
Cast
38 credited performers
Boris Karloff
Valdar
Margaret Lindsay
Helene von Lorbeer
Bruce Lester
Frank Bennett
Leonard Mudie
James Yeats
Holmes Herbert
Arthur Bennett
Artwork unavailable
Austin Fairman
George Bennett
William Bailey
British Intelligence Agent
Louise Brien
Miss Risdon - Bennett's Secretary
Glen Cavender
Under Officer Pfalz
Artwork unavailable
David Cavendish
Capt. Lanark
Joe De Stefani
German Officer
Artwork unavailable
Carlos De Valdez
Von Ritter
Artwork unavailable
Clarence Derwent
Milkman
Artwork unavailable
Arno Frey
German Junior Officer
Artwork unavailable
Frederick Giermann
Otto Kurtz
Lawrence Grant
Brigadier General
Carl Harbaugh
German Soldier
Artwork unavailable
Sam Harris
Cabinet Minister
Winifred Harris
Mrs. Maude Bennett
Leyland Hodgson
Lord Sudbury
Stuart Holmes
Luchow - German Soldier
Artwork unavailable
Willy Kaufman
German Corporal
Crauford Kent
Cmdr. Phelps
Morton Lowry
Lt. Borden
Lester Matthews
Henry Thompson
Frank Mayo
Brixton - Intelligence Agent
Paul Panzer
Peasant
John J. Richardson
Cockney Soldier
Ferdinand Schumann-Heink
German Officer
Hans Schumm
German Senior Officer
Artwork unavailable
John Graham Spacey
Crichton - Intelligence Agent
Artwork unavailable
Robert R. Stephenson
Cockney Soldier
Artwork unavailable
Evan Thomas
Maj. Andrews
Artwork unavailable
David Thursby
Agent Reporting Strengler's Identity
Frederick Vogeding
Baron Kuglar
Leonard Willey
Capt. Stuart
Maris Wrixon
Dorothy Bennett
Artwork unavailable
Henry Zynda
German