Bernard Rebel

as Prof. Eugene Dubois (uncredited)

as Zhadov

as Bishop

as Art Dealer

as Vachek

as Bearded Client (uncredited)

as Kalador (uncredited)

as Bearded Delegate (uncredited)

as Vinson - Spy Henchman

as Stefan

as Engraver

as The Count

as Mr. Wheeler

as Trubiev

as Lebrun

as Xenobian

as Doctor Bruno

as Prof. Leverrin

as Italian Passenger (uncredited)

as Quisling

as Klacken