Col. Von Kahr
Mr. Rolfe Bergh - Chaperon
Otto Masuis (1 episode)
Col. Wilhelm Krafft
Oberkommandant
Frank Gottwald (1 episode)
Josef (1 episode)
Dr. Heinrick Swansen (1 episode)
Dr. Leyden
Wilhelm Gottfried
Col. Karl Osler
Dr. Louis DuPont
Mr. Ettinger (uncredited)
Dr. Goebbel
Dr. Albert Fuss
Austrian Knight (uncredited)
Dr. Loran
Dr. Yeager
Capt. van Dorck
Dr. Wyatt
Dr. Rudolf Albrecht (1 episode)
Doctor (uncredited)
Gregory Marek
German (voice) (uncredited)
Rudolph Busch
Alberti
Hoffman
Stillman
Braun (uncredited)
Karl Hofmann
Horner - Nazi Saboteur (as Robert O. Davis)
Nazi Officer at Hitler's filmed Speech (uncredited)
Rudi Thysson
Lieutenant
Agent (as Robert O. Davis)
Colonel Eric Hartwig (as Robert O. Davis)
German Squad Leader
Col. Von Kohr
Gestapo Sergeant at Desk at Top of Hotel Stairs (uncredited)
Cab Driver (uncredited)
His Excellency
Dr. Fleming
Henry Schrode
Official
Frederick the Butler
Prussian Officer (Uncredited)
Feral--Henchman
Tomanian Commandant at Osterlich / Robert O. Davis
Elder in Norway (uncredited)
Storm Trooper
Gestapo Official Hartman
Alexander Komac
Herzfeld
Von Richtman
Paul Strawn (as Robert O. Davis)
Captain Straubel
Doctor (uncredited)
Emperor Franz Joseph
Sgt. Groeber
Superintendant's Assistant (uncredited)
Radio Operator (uncredited)
Violinist
Lt. Schroeder (as Rudolph Amendt)
Geof Van Leyden
Karl (as Rudolph Amendt)