Credits

• 1968 ·To Die in Parisas General Ludmer
• 1967 ·The Spy in the Green Hatas Dr. Heinrich von Kronen
• 1966 ·Too Many Thievesas Bulanerti
• 1966 ·Torn Curtainas Gustav Lindt
• 1965 ·Brandedas
• 1963 ·The Fugitiveas Dr. Josef Karac
• 1962 ·The Merv Griffin Showas Self
• 1961 ·Ben Caseyas
• 1961 ·Cain's Hundredas Hans Saltzman
• 1960 ·The Dybbukas Rabbi Azrael
• 1959 ·The Twilight Zoneas Ernst Ganz
• 1959 ·Judgment at Nurembergas Dr. Wickert
• 1958 ·Naked Cityas Owner of Pawnshop
• 1958 ·Naked Cityas Stefan
• 1958 ·Naked Cityas Doc Randall Benton
• 1957 ·Decoyas Fred
• 1957 ·Decoyas 'Knish' Levin
• 1956 ·Playhouse 90as Dr. Wickert
• 1955 ·Matinee Theateras
• 1953 ·The Veils of Bagdadas Kaffar
• 1953 ·Sins of Jezebelas Naboth
• 1952 ·My Pal Gusas Karl
• 1952 ·Omnibusas
• 1951 ·Hallmark Hall of Fameas Joseph
• 1951 ·Journey Into Lightas 'Doc' Thorssen
• 1951 ·Siroccoas Flophouse Proprietor
• 1951 ·The Great Carusoas Alfredo Brazzi
• 1950 ·Mystery Submarineas Dr. Adolph Guernitz
• 1950 ·The Killer That Stalked New Yorkas Dr. Cooper
• 1949 ·There's a Girl in My Heartas Professor Joseph Kroner
• 1949 ·Jolson Sings Againas Cantor Yoelson
• 1949 ·The Great Sinneras Doctor
• 1949 ·The Lovable Cheatas Violette
• 1949 ·The Fighting O'Flynnas Hendrigg
• 1948 ·Studio Oneas
• 1948 ·Sealed Verdictas Jakob Meyersohn
• 1948 ·To the Ends of the Earthas Nicholas Sokim
• 1947 ·Cigarette Girlas Otto
• 1946 ·Blondie Knows Bestas Dr. Titus
• 1946 ·The Jolson Storyas Cantor Yoelson
• 1946 ·Renegadesas Jackorski
• 1946 ·The Devil's Maskas Dr. Karger
• 1946 ·Gildaas German Cartel Member
• 1945 ·Prison Shipas Professor
• 1945 ·Counter-Attackas Mueller
• 1944 ·The Master Raceas Schmidt (as Louis Donath)
• 1943 ·The Strange Death of Adolf Hitleras Adolf Hitler / Franz Huber
• 1943 ·Above Suspicionas Gestapo Officer in Schultz's Laboratory (Uncredited)
• 1943 ·This Land Is Mineas German Captain
• 1943 ·Hangmen Also Die!as Schirmer
• 1943 ·Margin for Erroras Hitler's Voice
• 1942 ·Reunion in Franceas Desk Clerk in Hotel (uncredited)
• 1942 ·Lady from Chungkingas Hans Gruber
• 1942 ·The Secret Codeas Nazi Prof. Metzger
• 1932 ·Girls to Marryas
• Future ·He's Aliveas Ernst Ganz
• 1921 ·Theodor Herzl, Standard-Bearer of the Jewish Peopleas Prinz Eugen