The Deadly Game (1941)

A preWorld War II saberrattler that finds a munitions inventor kidnapped a federal agent killed and a beautiful refugee mysteriously missing as Washingtons deadly game of espionage and intrigue thunders onas the FBI hunts the nations invisble foes They may have been invisible but their accents and billing names von Morhart William Vaughn William von Brincken already hiding under another name before hostilities were formally declared Frederick Gierman and Walter Bonnprovide clues aplenty as to their country of origin and paymaster