As Actor
| Year | Title | Character | Type |
|---|---|---|---|
| 1981 | Skokie | Sol Goldstein | Movie |
| 1979 | Nero Wolfe | Fritz Benner | Movie |
| 1978 | The Boys from Brazil | Strasser | Movie |
| 1978 | Child of Glass | Jacques Dumaine | Movie |
| 1976 | Quincy, M.E. | Dr. Fred Webber | TV |
| 1976 | Charlie's Angels | Stovich | TV |
| 1971 | Great Performances | Schnable | TV |
| 1971 | Paradise Lost | Schabel | Movie |
| 1970 | McCloud | TV | |
| 1970 | Kelly's Heroes | Col. Dunkhepf | Movie |
| 1969 | Hello, Dolly! | Rudolph Reisenweber | Movie |
| 1968 | The Mod Squad | TV | |
| 1968 | To Die in Paris | Pirot | Movie |
| 1968 | How to Steal the World | Dr. Jan Vanovech | Movie |
| 1967 | Mannix | Vladek | TV |
| 1967 | The Flying Nun | TV | |
| 1966 | Star Trek | Ambassador Hodin | TV |
| 1966 | Mission: Impossible | Victor Grigov | TV |
| 1966 | Mission: Impossible | Dr. Oswald Beck | TV |
| 1966 | The Monkees | The Baron | TV |
| 1966 | The Girl from U.N.C.L.E. | Matthew Brecker | TV |
| 1966 | Hawk | TV | |
| 1965 | The F.B.I. | Alex Keeler | TV |
| 1965 | Run for Your Life | Heinrich Kleist | TV |
| 1964 | The Man from U.N.C.L.E. | Dr. Leland Mayes Elmont | TV |
| 1964 | The Man from U.N.C.L.E. | Dr. Jan Vanovech | TV |
| 1964 | Quick, Let's Get Married | Gustave | Movie |
| 1963 | The Patty Duke Show | TV | |
| 1959 | Play of the Week | TV | |
| 1957 | DuPont Show of the Month | Mr. Stryver | TV |
| 1957 | Theatre Night | The Colonel | TV |
| 1957 | After the Ball | Perelli | Movie |
| 1955 | As Long as They're Happy | Dr. Hermann Schneider | Movie |
| 1955 | One Good Turn | Professor Dofee | Movie |
| 1955 | All for Mary | M. Victor | Movie |
| 1954 | Mad About Men | Signor Mantalini | Movie |
| 1954 | River Beat | Paddy Maclure | Movie |
| 1953 | Rough Shoot | Lex | Movie |
| 1953 | Always a Bride | Beckstein | Movie |
| 1952 | Top Secret | Deutsch | Movie |
| 1952 | So Little Time | Blumel | Movie |
| 1952 | Venetian Bird | Minelli | Movie |
| 1952 | Mother Riley Meets the Vampire | Mugsy | Movie |
| 1951 | Hallmark Hall of Fame | Petrovini | TV |
| 1951 | Smart Alec | Poppi | Movie |
| 1950 | Soho Conspiracy | Franco | Movie |
| 1949 | The Perfect Woman | Wolfgang Wilhelm Winkel II (Swiss waiter) | Movie |
| 1947 | Kraft Television Theatre | Arthur Crook | TV |