as Sergei Ratov

as Professor Heinrich

as Jacques Rival

as Prof. Franck

as Professor Jean Perot

as Dr. Carl Hesser

as Dr. Storm

as Hugo Schroeder

as Arnold Schmidt

as General Borelski

as Dr. Ludwig Mather

as Dr. Coutras

as Consul Magnus Barring

as Van Elst

as Van Meer

as Dr. Robert Koch

as Franz Geller

as Basil Renner

as Professor ten Brinken

as Sothis