The Last Laugh 2016 · Self (archive footage) (uncredited)
Late Night with Conan O'Brien 1993 · Self
Queen Esther 1992 · Haman (voice)
Thailand: Earth's Tropical Paradise 1991 · Fat Man Looking for a Tax Break
Law & Order 1990 · William Unger
The Simpsons 1989 · Colonel Klink (voice)
Cabaret 1988 · Herr Schultz
Matt Houston 1982 · Felix Randolph
The Return of the Beverly Hillbillies 1981 · C.D. Medford
Steve Martin: Comedy Is Not Pretty 1980 · Plato
The Love Boat 1977 · Mr. Perkins
The Rhinemann Exchange 1977 · Franz Altmuller
Assignment: Munich 1972 · Insp. Hoffman
Place of Belonging 1972 · Narrator
McMillan & Wife 1971 · Dr. Ernest Bleeker
Wake Me When the War Is Over 1969 · Erich Mueller
The Doris Day Show 1968 · Werner Klemperer
Star Spangled Salesman 1968 · Chief's Boss
Rowan & Martin's Laugh-In 1968 · Self / Colonel Klink (uncredited)
The Wicked Dreams of Paula Schultz 1968 · Klaus
Batman 1966 · Colonel Klink
Bing Crosby Color Christmas Show 1965 · Self/Col. Klink
Hogan's Heroes 1965 · Wilhelm Klink
Lost in Space 1965 · Bolix
Ship of Fools 1965 · Lt. Huebner
Dark Intruder 1965 · Prof. Malaki
Youngblood Hawke 1964 · Mr. Leffer
The Man from U.N.C.L.E. 1964 · Laslo Kurasov
Voyage to the Bottom of the Sea 1964 · Dr. Gamma (uncredited)
Bob Hope Presents the Chrysler Theatre Series Bob Hope Presents the Chrysler Theatre 1963 · Colonel Wertha
Escape from East Berlin 1962 · Walter Brunner
General Electric True 1962
Judgment at Nuremberg 1961 · Emil Hahn
The Mike Douglas Show 1961 · Self - Co-Host
Operation Eichmann 1961 · Adolf Eichmann
