Obsada:

• Boris Karloff Valdar / Karl Schiller
• Margaret Lindsay aka Frances Hautry Helene Von Lorbeer
• Bruce Lester Frank Bennett
• Leonard Mudie Col. James Yeats
• Holmes Herbert Arthur Bennett
• Austin Fairman George Bennett
• William Bailey British Intelligence agent
• Louise Brien Bennett's secretary Miss Risdon
• Glen Cavender Under Officer Pfalz
• David Cavendish Capt. Lanark
• Clarence Derwent Milkman
• Joe De Stefani German officer
• Carlos De Valdez Von Ritter
• Arno Frey German junior officer
• Frederick Giermann Otto Kurtz
• Lawrence Grant Brigadier General
• Carl Harbaugh German soldier
• Sam Harris Cabinet minister
• Winifred Harris Mrs. Maude Bennett
• Leyland Hodgson Lord Sudbury
• Stuart Holmes a German soldier Luchow
• Willy Kaufman German corporal
• Crauford Kent Cmdr. Phelps
• Morton Lowry Lt. Borden
• Lester Matthews Henry Thompson
• Frank Mayo Intelligence agent Brixton
• Paul Panzer Peasant
• Jack Richardson Cockney soldier
• Ferdinand Schumann-Heink German officer
• Hans Schumm German senior officer
• John Graham Spacey Intelligence agent Crichton
• Robert R. Stephenson Cockney soldier
• Evan Thomas Maj. Andrews
• David Thursby Agent reporting Strengler's identity
• Frederick Vogeding Baron Kuglar
• Leonard Willey Capt. Stuart
• Maris Wrixon Dorothy Bennett
• Henry Zynda German