Cedric Hardwicke
— Col. Lanser
Henry Travers
— Mayor Orden
Lee J. Cobb
— Dr. Albert Winter
Dorris Bowdon
— Molly Morden
Margaret Wycherly
— Mme. Sarah Orden
Peter van Eyck
— Lt. Tonder
William Post Jr.
— Alex Morden
Henry Rowland
— Capt. Loft
E.J. Ballantine
— George Corell
Richard Abbott
— Villager (uncredited)
Louis V. Arco
— Schumann (uncredited)
Georgia Backus
— Villager (uncredited)
John Banner
— Lt. Prackle (uncredited)
Trevor Bardette
— Knute Pierson (Foreman) (uncredited)
Hank Bell
— Villager (uncredited)
John Bleifer
— Miner (uncredited)
Sven Hugo Borg
— Sergeant (uncredited)
Tom Brown
— Boy (uncredited)
Frederic Brunn
— German Soldier (uncredited)
Ricardo Lord Cezon
— Boy (uncredited)
Harry Cording
— Miner (uncredited)
Jeff Corey
— Albert (uncredited)
Albert D'Arno
— German Soldier (uncredited)
Joseph Eggenton
— Villager (uncredited)
Edith Evanson
— Ludwig's Wife (uncredited)
Monica Folts
— Girl (uncredited)
Frederick Giermann
— Sergeant (uncredited)
Gibson Gowland
— Villager (uncredited)
Ludwig Hardt
— Elderly Man (uncredited)
Ernst Hauessermann
— Moeller (uncredited)