William Hall
Capt. Todd Hayden
Jane Wyman
Elaine Burdette
Esther Ralston
Jean Bruce (as Jane Carleton)
Robert Warwick
Col. Burdette
Leon Ames
Frank Denton
Ben Alexander
Capt. Don Mayhew
Don Barclay
Private Timothy O'Reilly
Egon Brecher
General A. R. Bowen
Paul Sutton
Charley (Spy-Ring Chauffeur)
Jack Mulhall
Capt. Tex Randolph
LeRoy Mason
Paul Douglas
Harry Woods
Capt. Holden
Phillip Trent
Capt. Robert Scott
Lester Dorr
Firing Range Radio Operator (uncredited)
Pat Gleason
Reporter (uncredited)
Eddie Gribbon
Sergeant Who Threatens Mayhew (uncredited)
Harry Harvey
Reporter (uncredited)
Carlyle Moore Jr.
Cavalry Officer Playing Polo (uncredited)
Eddie Parker
Reporter (uncredited)
John Ridgely
Spy Ring Member (uncredited)
Frances Robinson
Girl at Officer's Club Dinner (uncredited)
Carl Stockdale
Firing Range Officer (uncredited)
Glenn Strange
The 'Champ' (uncredited)
Forrest Taylor
G-2 Sergeant (uncredited)
Carleton Young
Polo Game Timekeeper (uncredited)