Credits

• 1975 ·Film Emigration from Nazi Germanyas Self (archive footage)
• 1951 ·The Gentleman in Room 6as Guest
• 1944 ·Resisting Enemy Interrogationas Herr Mahler - German Red Cross Representative
• 1944 ·Passage to Marseilleas
• 1943 ·First Comes Courageas Nazi Captain (uncredited)
• 1943 ·Background to Dangeras German Officer
• 1943 ·Hitler's Madmanas
• 1943 ·Hangmen Also Die!as Reinhard Heydrich
• 1943 ·Edge of Darknessas German Co-Pilot (uncredited)
• 1943 ·Margin for Erroras Fritz - Butler
• 1943 ·Casablancaas German Officer with Yvonne (uncredited)
• 1942 ·Once Upon a Honeymoonas German Officer (uncredited)
• 1942 ·The Dawn Expressas Capt. Gemmler
• 1939 ·Hitler: Beast of Berlinas Albert Stalhelm - Storm Trooper
• 1939 ·Espionage Agentas Dr. Helm
• 1939 ·Confessions of a Nazi Spyas Helldorf
• 1935 ·The Crusadesas Nicholas, Count of Hungary
• 1935 ·Storm Over the Andesas Oberto (as Hans Von Twardowski)
• 1934 ·The Scarlet Empressas
• 1933 ·The Devil's in Loveas Andre's Defense Counsel
• 1933 ·Adorableas Prince of Pontevedro
• 1933 ·Private Jonesas Von Bergen (uncredited)
• 1932 ·6 Hours to Liveas Flosky
• 1932 ·Scandal for Saleas Affner, the pilot
• 1931 ·The Holy Flamesas Robert Taylor
• 1930 ·The Singing Cityas Willi von Wellheim - Claires Verehrer
• 1930 ·Ludwig II, King of Bavariaas Otto von Wittelsbach (as H.H. von Twardowsky)
• 1929 ·Peter, der Matroseas
• 1929 ·I Kiss Your Hand, Madameas Waiter
• 1928 ·Sex in Chainsas Alfred
• 1928 ·Die Hölle der Jungfrauenas
• 1927 ·Der falsche Prinzas Wolf, sein Freund
• 1927 ·The Weaversas Gottfried Hilse
• 1924 ·The Enchantressas
• 1923 ·I.N.R.I. – A Film of Humanityas Johannes
• 1922 ·Phantomas Hugo Lubota
• 1922 ·Marizzaas
• 1921 ·The House on the Moonas
• 1920 ·The Night of Queen Isabeauas Page
• 1920 ·Genuine: The Tragedy of a Vampireas Florian
• 1920 ·The Cabinet of Dr. Caligarias Alan
• 1920 ·From Morn to Midnightas Sohn der Dame
• 1919 ·Eerie Talesas Restaurant Waiter