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