Acting

1975

(5 episodes) as Self (archive footage)

1951

as Guest

1944

as Herr Mahler - German Red Cross Representative

1943		First Comes Courage as Nazi Captain (uncredited)
1943		Background to Danger as German Officer
1943		Hitler's Madman
1943		Hangmen Also Die! as Reinhard Heydrich
1943		Edge of Darkness as German Co-Pilot (uncredited)
1943		Margin for Error as Fritz - Butler
1943		Casablanca as German Officer with Yvonne (uncredited)

1942		Once Upon a Honeymoon as German Officer (uncredited)
1942		The Dawn Express as Capt. Gemmler

1939		Hitler: Beast of Berlin as Albert Stalhelm - Storm Trooper
1939		Espionage Agent as Dr. Helm
1939		Confessions of a Nazi Spy as Helldorf

1935		The Crusades as Nicholas, Count of Hungary
1935		Storm Over the Andes as Oberto (as Hans Von Twardowski)

1934

1933		The Devil's in Love as Andre's Defense Counsel
1933		Adorable as Prince of Pontevedro
1933		Private Jones as Von Bergen (uncredited)

1932		6 Hours to Live as Flosky
1932		Scandal for Sale as Affner, the pilot

1931

as Robert Taylor

1930		The Singing City as Willi von Wellheim - Claires Verehrer
1930		Ludwig II, King of Bavaria as Otto von Wittelsbach (as H.H. von Twardowsky)

1929		Peter, der Matrose
1929		I Kiss Your Hand, Madame as Waiter

1928		Sex in Chains as Alfred
1928		Die Hölle der Jungfrauen

1927		Der falsche Prinz as Wolf, sein Freund
1927		The Weavers as Gottfried Hilse

1924

1923

as Johannes

1922		Phantom as Hugo Lubota
1922		Marizza

1921

1920		The Night of Queen Isabeau as Page
1920		Genuine: The Tragedy of a Vampire as Florian
1920		The Cabinet of Dr. Caligari as Alan
1920		From Morn to Midnight as Sohn der Dame

1919

as Restaurant Waiter