as Prof. Eugene Dubois (uncredited)

as Art Dealer

as Vachek

as Kalador (uncredited)

as Vinson - Spy Henchman

as Stefan

as Mr. Wheeler

as The Count

as

as Trubiev

as Lebrun

as Xenobian

as Doctor Bruno

as Prof. Leverrin

as Italian Passenger (uncredited)

as Klacken