Austin Trevor

as Judson

as Sir John Kelly (uncredited)

as Dean Foster

as Commissioner Wayne

as The Herald

as Police Commissaire

as Prof. Palmer

as The Duke

as Capt. Prada

as Schulemberg - German Air Chief of Staff

as Ralston

as Col. Adraxine

as Dr. Muller

as Monocle Man (uncredited)

as Marquis de Grand Coeur

as Le Beau

as Leopold Dryden