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