Kane Richmond

Alan Armstrong / Spy Smasher / Jack Armstrong

Marguerite Chapman

Eve Corby

Sam Flint

Admiral Corby

Hans Schumm

The Mask

Franco Corso

Capt. Pierre Durand

Hans von Morhart

Capt. Gerhardt

Georges Renavent

Gov. LeConte

Rudolph Anders

Col. Von Kahr

Henry Zynda

Ritter Lazar

Paul Bryar

Lawlor

Tom London

Crane

Richard Bond

Hayes

Crane Whitley

Dr. Hauser

John James

Steve

Frank Alten

Storm Trooper Captain (uncredited)

Dudley Dickerson

Train Porter (uncredited)

Yakima Canutt

Armored Car Driver (uncredited)

William Forrest

Gerald Douglas (uncredited)

Arvon Dale

Thornton (uncredited)