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)