The Spy Ring
Plotters Gamble Death for Anti-Aircraft Secrets!
1/8/1938
Imdb: tt0030784
Tmdb: 427927
Popularity: 2.832
Vote: 5/10 (3)

Two American-army officers are working on a new type of machine-gun for anti-aircraft warfare, when one of them is murdered. The other vows to get the spies that are after the invention and avenge his friend's death.