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.
William Hall
Jane Wyman
Esther Ralston
Robert Warwick
Leon Ames
Ben Alexander
Don Barclay
Egon Brecher
Paul Sutton
Jack Mulhall
LeRoy Mason
Harry Woods
Phillip Trent
Lester Dorr
Pat Gleason
Eddie Gribbon
Harry Harvey
Carlyle Moore Jr.
Eddie Parker
John Ridgely
Frances Robinson
Carl Stockdale
Glenn Strange
Forrest Taylor
Carleton Young