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