Jack Mylong-Münz

Archive Footage (Robot Monster)

Ernst Steinhauer

Papa Sante (uncredited)

Karl Borgen

Gen. Foeldessy

Horseman

Dr. Jasny

Mr. Duchin

Patriarch

Herr Gosting

Herr Koenig

Doctor

Dr. Hofer

Kroll

The Professor

J.M. Hennick

Policeman

Manager

Martin Krafft

Kaiser Wilhelm II (uncredited)

Col. von Arnheim

Colonel Henry Bouquet

Impresario

Mr. Malborn

Peter Vantine / Carl Dudley

Nicholas Bederaux, Sr. (uncredited)

Druhar (uncredited)

Submarine Commander

Colonel Duval