Film

No.	Year	Title	Role	Vote Average
1	1921	Theodor Herzl, Standard-Bearer of the Jewish People	Prinz Eugen	50
2	1932	Girls to Marry		50
3	1942	The Secret Code	Nazi Prof. Metzger	51
4	1942	Lady from Chungking	Hans Gruber	52
5	1942	Reunion in France	Desk Clerk in Hotel (uncredited)	64
6	1943	Margin for Error	Hitler's Voice	57
7	1943	Hangmen Also Die!	Schirmer	69
8	1943	This Land Is Mine	German Captain	71
9	1943	Above Suspicion	Gestapo Officer in Schultz's Laboratory (Uncredited)	65
10	1943	The Strange Death of Adolf Hitler	Adolf Hitler / Franz Huber	46
11	1944	The Hitler Gang	Gustav von Kahr	60
12	1944	The Master Race	Schmidt (as Louis Donath)	62
13	1945	Counter-Attack	Mueller	60
14	1945	Prison Ship	Professor	60
15	1946	Gilda	German Cartel Member	75
16	1946	The Devil's Mask	Dr. Karger	57
17	1946	Renegades	Jackorski	58
18	1946	The Jolson Story	Cantor Yoelson	66
19	1946	Blondie Knows Best	Dr. Titus	64
20	1947	Cigarette Girl	Otto	0
21	1948	To the Ends of the Earth	Nicholas Sokim	57
22	1948	Sealed Verdict	Jakob Meyersohn	55
23	1949	The Fighting O'Flynn	Hendrigg	60
24	1949	The Lovable Cheat	Violette	30
25	1949	The Great Sinner	Doctor	66
26	1949	Jolson Sings Again	Cantor Yoelson	60
27	1949	There's a Girl in My Heart	Professor Joseph Kroner	0
28	1950	The Killer That Stalked New York	Dr. Cooper	61
29	1950	Mystery Submarine	Dr. Adolph Guernitz	40
30	1951	The Great Caruso	Alfredo Brazzi	57
31	1951	Sirocco	Flophouse Proprietor	58
32	1951	Journey Into Light	'Doc' Thorssen	60
33	1952	My Pal Gus	Karl	70
34	1953	Sins of Jezebel	Naboth	45
35	1953	The Veils of Bagdad	Kaffar	60
36	1959	Judgment at Nuremberg	Dr. Wickert	0
37	1960	The Dybbuk	Rabbi Azrael	0
38	1966	Torn Curtain	Gustav Lindt	66
39	1966	Too Many Thieves	Bulanerti	45
40	1967	The Spy in the Green Hat	Dr. Heinrich von Kronen	65
41		He's Alive	Ernst Ganz	0
42	1968	To Die in Paris	General Ludmer	0

Television

No.	Year	Title	Role	Vote Average
1	1948	Studio One		50
2	1951	Hallmark Hall of Fame	Joseph	86
3	1952	Omnibus		60
4	1955	Matinee Theater		50
5	1956	Playhouse 90	Dr. Wickert	76
6	1957	Decoy	Fred	62
7	1957	Decoy	'Knish' Levin	62
8	1958	Naked City	Owner of Pawnshop	55
9	1958	Naked City	Stefan	55
10	1958	Naked City	Doc Randall Benton	55
11	1959	The Twilight Zone	Ernst Ganz	84
12	1961	Cain's Hundred	Hans Saltzman	47
13	1961	Ben Casey		56
14	1962	The Merv Griffin Show	Self	58
15	1963	The Fugitive	Dr. Josef Karac	72
16	1965	Branded		64