Martin Miller

as Prof. Yuri Dutrov

as Prof. Vivier

as Police Chief (uncredited)

as Watchmaker / Number Fifty Four

as Herman

as Head Waiter

as Father

as Rabbi Taub

as Kublai Khan

as Prof. Gruber

as Pierre Luigi - Photographer

as Kublai Khan

as Mr Smith

as Dr. Schwatzbacher

as Hugo Bergmann

as Schroeder

as Man with Microscope

as Mr. Justin

as Jerome

as Dr. Stelitz

as Rossi

as Dr. Odenheim

as Stavros

as Ambrose Solto

as Dr. Rosen

as Dr. Schrott

as Hendricks

as Brunet

as Schlip

as Lochner

as Professor Topolski

as Thomas Stenbourg

as Paolo Vespucci

as Bandleader at Alligator Rally (uncredited)

as Swiss Tailor

as Igy Pulitzer

as Dr. Fergus

as Brodcynsky

as Papa

as Carlo Penezzi

as Nicholas Loewenschild

as Herr Schindler (uncredited)

as Leon Stoltz

as Tony - Cafe Proprietor

as Customer

as George II

as Mario - Waiter at the Savoy

as Police Inspector

as Dr. Hans Tautz

as Professor

as Postman

as Morgue Keeper

as Professor Hansen

as Schmidt

as Walter Vogel

as Doctor Novotny

as Mr. Krohn