William Hall as Capt. Todd Hayden

Jane Wyman as Elaine Burdette

Esther Ralston as Jean Bruce (as Jane Carleton)

Robert Warwick as Col. Burdette

Leon Ames as Frank Denton

Ben Alexander as Capt. Don Mayhew

Don Barclay as Private Timothy O'Reilly

Egon Brecher as General A. R. Bowen

Paul Sutton as Charley (Spy-Ring Chauffeur)

Jack Mulhall as Capt. Tex Randolph

LeRoy Mason as Paul Douglas

Harry Woods as Capt. Holden

Phillip Trent as Capt. Robert Scott

Lester Dorr as Firing Range Radio Operator (uncredited)

Pat Gleason as Reporter (uncredited)

Eddie Gribbon as Sergeant Who Threatens Mayhew (uncredited)

Harry Harvey as Reporter (uncredited)

Carlyle Moore Jr. as Cavalry Officer Playing Polo (uncredited)

Eddie Parker as Reporter (uncredited)

John Ridgely as Spy Ring Member (uncredited)

Frances Robinson as Girl at Officer's Club Dinner (uncredited)

Carl Stockdale as Firing Range Officer (uncredited)

Glenn Strange as The 'Champ' (uncredited)

Forrest Taylor as G-2 Sergeant (uncredited)

Carleton Young as Polo Game Timekeeper (uncredited)