Mr. Klein

Baron Karl Ludwig von Ettenburg

Dr. Leipsig (1 episode)

Mr. Potovsky (1 episode)

Carl Turner (1 episode)

Papa Eros (1 episode)

Max, the Bookkeeper (1 episode)

Mr. Schultz (1 episode)

Adolph Strauss (1 episode)

Papa Mueller

Mr. Kringle (1 episode)

Halder (1 episode)

Walter (1 episode)

Arthur (1 episode)

German Jeweler (1 episode)

Baltus Van Tassel (1 episode)

Amos Lampton (1 episode)

Captain

Ludwig Teller

Kohner

Yo-Yo

Prof Schoepp

Steiner (1 episode)

Grandpa Reindley

Otto Heindorf (1 episode)

Dutchman

Scientist Jan Moleska (uncredited) (1 episode)

Emile, the Gentleman's Tailor (uncredited)

Benny

Knubel (uncredited)

Pierre

Hans Dache

Hernandez - Man with Briefcase (uncredited)

Nikolai

Marchetti (uncredited)

Marcel Vivin

Monsieur Begue (uncredited)

Prof. Montague

Stooge (uncredited)

Schultz (uncredited)

Mr. Bostoff (uncredited)

Minister (uncredited)

Head Waiter

Teuton

Consul (uncredited)

Takahashi

Dutch Banker (uncredited)