as John Stuart
as Marx, Aushilfsdiener
as Archive Footage (Robot Monster)
as Colonel Henry Bouquet
as Harry Webber, genannt "Juwelen Harry"
as Felix, sein Sohn
as Nicholas Bederaux, Sr. (uncredited)
as Gen. Foeldessy
as Jan
as Dr. Hofer
as Papa Sante (uncredited)
as J.M. Hennick
as Colonel Duval
as Mr. Duchin
as Herr Gosting
as Kaiser Wilhelm II (uncredited)
as Druhar (uncredited)
as Martin Krafft
as Biller, gegnerischer Mittelstürmer
as Staff Officer (uncredited)
as Ernst Steinhauer
as Mr. Malborn
as Raumert, Brauereibesitzer
as Arthur Dreyer
as Col. von Arnheim
as Stanislaw Maniusko
as Gen. Seydlitz
as Impresario
as Peter Vantine / Carl Dudley
as Minister Hagen
as Herr Koenig
as Von Eltzen
as Boris
as Captain of Submarine
as Submarine Commander
as The Professor
as Rolf Sander
as Kroll
as Dr. Harry Edwards
as Kelly
as Jürg Asmussen
as Zahnstocher-Jeff
as Rabob
as Policeman
as Manager
as Doctor
as Karl Borgen
as Horseman
