as Dr. Franken
as Geneva Man
as Mr. Sandor
as Dr. Klauber
as Dr. Brenner
as Hotel Barkeeper (uncredited)
as Otto Kuhn
as Professor Kent
as Stage Director
as Dr. Adolph Behrens
as Mr. Hauen
as German Businessman (uncredited)
as Klaus
as Dr. Zinker
as Herr Barthel
as Regisseur
as Zar
as Jan Dorchik
