
Otto Kessler
Adolph Van Beers
Doctor
Professor Berdorff
Mr. Leuchtag (uncredited)
Gustav Muller
Dr. Schickel
Henry 'Pop' Gehrig
Riederer, Amtshauptmann von St. Vigil
Dr. Grazlich (Doc Powers' Partner)
Dr. Lubbeck
Professor Träumer
Siegfried
Jean Lamarte
Haslinger
Capt. Ziemer (uncredited)
Dr. Fritz Heine
Caesar
German Piano Accompanist (uncredited)
Mr. Otto
Carl Baumann
Hotel Manager
Arbeiter
Dr. Anton Marek
Major Domo
Dr. Mueller
The German
Pastor
Herman Felsburg
Dr. Snider
Prof. Müller
Self
Grand Duke Otto
Hotelier Brunn
Owner of Puppet Show
Aldo Von Metz
Capt. Angst
Dr. Schmidt
Brock (uncredited)
School Teacher (as Ludwig Stossel)
Wilhelm
Der Varieté-Agent
Personalchef Klapper
Peter
Dr. Gerhardt
Livius Heintze, Unterwäschefabrikant
Papa Svoboda
Papa Julius Steelman
Mr. Puft
Generaldirektor Leon
Professor Berger
Dr. Szicki
Herman Bauer, bugomaster
Mr. Steinach
Professor
Louis
Dir. Rohrbach
Theaterdirektor
Popsy Lorenz
Li Yoseph
Zuschauer
Franz Polgar
Professor Roff
Underground Leader
Otto
Bratfisch
Binns
Der Hoteldirektor
Vetter, der Pfarrer von Sankt Jakob
Dr. Breithaut
Professor Harnish
Valentin Rainer
Jonathan Bigby / clock-keeper
Mr. Novak (uncredited)
Herr Schultz the Innsbruck Forger (Uncredited)
Herman Miller
Pichler
Freund
Baron Kiesel
Peter Van Tyne
Graub