Ludwig Stössel

as Dr. Fritz Heine

as Aldo Von Metz

as Dr. Szicki

as Herman Felsburg

as Grand Duke Otto

as Major Domo

as Hotel Manager

as Mr. Steinach

as Dr. Mueller

as The German

as Siegfried

as School Teacher (as Ludwig Stossel)

as Mr. Puft

as Mr. Otto

as Jean Lamarte

as Carl Baumann

as Herman Bauer, bugomaster

as Dr. Grazlich (Doc Powers' Partner)

as Dr. Anton Marek

as Henry 'Pop' Gehrig

as Dr. Lubbeck

as Dr. Schickel

as Doctor

as Dr. Gerhardt