Police Chief (uncredited)

Herman

Head Waiter

Kublai Khan

Prof. Gruber

Pierre Luigi - Photographer

Dr. Schwatzbacher

Hugo Bergmann

Schroeder

Man with Microscope

Rossi

Dr. Odenheim

Ambrose Solto

Dr. Rosen

Dr. Schrott

Hendricks

Brunet

Schlip

Lochner

Professor Topolski

Paolo Vespucci

Bandleader at Alligator Rally (uncredited)

Igy Pulitzer

Dr. Fergus

Brodcynsky

Papa

Carlo Penezzi

Herr Schindler (uncredited)

Leon Stoltz

Tony - Cafe Proprietor

Customer

George II

Mario - Waiter at the Savoy

Dr. Hans Tautz

Professor

Postman

Morgue Keeper

Professor Hansen

Schmidt

Walter Vogel

Doctor Novotny

Mr. Krohn