Erwin Kalser

as Geneva Man

as Dr. Klauber

as Mr. Sandor

as Professor Kent

as Stage Director

as Otto Kuhn

as German Businessman (uncredited)

as Hotel Barkeeper (uncredited)

as Mr. Hauen

as Dr. Franken

as Dr. Brenner

as Regisseur

as Dr. O'Meara

as Dr. Zinker

as Redner in der Irrenanstalt

as Dr. Adolph Behrens

as Klaus

as Zar