Arnold Marlé

as Josef Blumfeld

as Old Man on Train (uncredited)

as Dr. Murton

as Duval

as Prof. Ludwig Weiss

as Winkler

as Scientist (uncredited)

as Lhama

as Flower Seller

as Karl Kopek

as Papa Moreau

as Prof. Leon Dushenko

as The Lama of Rong-ruk Monastery

as Prof. Pal Kudnic

as Vittorio Miranda

as Otto

as Manager of Teatro La Fenice

as Professor Franz Menzel

as Joseph

as Prof. Gollner

as President of the Medical Society (uncredited)

as Pieter Sluys

as Dirk Brak