Ludwig Stössel

as Owner of Puppet Show

as Dr. Fritz Heine

as Aldo Von Metz

as Dr. Szicki

as Piano Tuner (1 episode)

as Wilhelm

as Otto Kessler (1 episode), as Adolph Van Beers (1 episode)

as Mr. Novak (uncredited)

as Mr. Fixit (1 episode)

as Self (1 episode)

as Professor Berger

as Professor (1 episode)

as Herman Felsburg

as Peter Van Tyne

as Grand Duke Otto

as Professor Harnish (1 episode)

as Papa Svoboda

as Major Domo

as Professor Roff (1 episode)

as German Piano Accompanist (uncredited)