(1958) Houseboat

as Harold Messner

(1961) Judgment at Nuremberg

as Emil Hahn

(1958) The Goddess

as Joe Wilsey

(1965) Ship of Fools

as Lt. Huebner

(1956) The Wrong Man

as Dr. Bannay (uncredited)

(1956) Death of a Scoundrel

as Herbert Bauman (Clementi's lawyer)

(1992) Queen Esther

as Haman (voice)

(1956) Five Steps to Danger

as Dr. Frederick Simmons

(1965) Dark Intruder

as Prof. Malaki

(1957) Istanbul

as Paul Renkov

(1956) Flight to Hong Kong

as Bendesh

(2016) The Last Laugh

as Self

(1972) Place of Belonging

as Narrator

(1969) Wake Me When the War Is Over

as Maj. Erich Mueller

(1962) Escape from East Berlin

as Walter Brunner

(1968) The Wicked Dreams of Paula Schultz

as Klaus

(1981) The Return of the Beverly Hillbillies

as C.D. Medford

(1961) Operation Eichmann

as Adolf Eichmann

(1980) Steve Martin: Comedy Is Not Pretty

as Plato

(1991) The Cabinet of Dr. Ramirez

as Fat Man Looking for a Tax Break

(1972) Assignment: Munich

as Insp. Hoffman

(1957) Kiss Them for Me

as Lt. Walter Wallace

(1964) Youngblood Hawke

as Mr. Leffer

(1958) The High Cost of Loving

as Joseph Jessup

(1968) Star Spangled Salesman

as Chief's Boss

(1959) Judgment at Nuremberg

as Emil Hahn

(1965) Bing Crosby Color Christmas Show

as Self/Col. Klink

(1988) Cabaret

as Herr Schultz

(1989) The Simpsons

as Colonel Klink (voice)

(1990) Law & Order

as William Unger

(1958) 77 Sunset Strip

as ---

(1977) Tabitha

as ---

(1966) Batman

as Colonel Klink

(1965) Lost in Space

as Bolix

(1965) Hogan's Heroes

as Wilhelm Klink

(1955) Gunsmoke

as Clifton Bunker

(1957) Perry Mason

as Stefan Riker

(1970) Night Gallery

as ---

(1953) General Electric Theater

as Mr. Muller

(1960) The Islanders

as Michel Serati

(1955) Alfred Hitchcock Presents

as Professor Klopka / Captain Kriza

(1952) China Smith

as ---

(1959) Rawhide

as ---

(1978) Vega$

as ---

(1957) Have Gun, Will Travel

as ---

(1967) Rowan & Martin's Laugh-In

as Self

(1986) Mr. Sunshine

as ---

(1960) Thriller

as Mr. Clark

(1957) The Thin Man

as ---

(1959) One Step Beyond

as Herr Bautmann

(1954) Climax!

as ---

(1959) Men Into Space

as ---

(1957) M Squad

as Heinrich Ronn

(1959) Adventures in Paradise

as Kuberli

(1955) Matinee Theater

as ---

(1948) The Philco Television Playhouse

as Leopold

(1959) The Alaskans

as ---

(1955) Navy Log

as ---

(1963) The Dakotas

as ---

(1956) Wire Service

as Krylov

(1962) General Electric True

as ---

(1959) The Third Man

as ---

(1960) Peter Loves Mary

as ---

(1958) Behind Closed Doors

as ---

(1954) Studio 57

as ---

(1957) Maverick

as Alex Jennings

(1956) Tony Awards

as Self - Nominee

(1958) Steve Canyon

as Linz

(1968) The Doris Day Show

as Werner Klemperer

(1977) The Rhinemann Exchange

as Franz Altmuller

(1960) Checkmate

as Franz Leder

(1956) Playhouse 90

as Emil Hahn

(1957) Perry Mason

as Ulric Zenas

(1957) Perry Mason

as Police Insp. Hurt

(1963) Bob Hope Presents the Chrysler Theatre

as Colonel Wertha

(1955) Alfred Hitchcock Presents

as Mr. Ranks

(1960) The Case of the Dangerous Robin

as Jan Hoveen

(1971) McMillan & Wife

as Dr. Ernest Bleeker

(1948) The Philco Television Playhouse

as ---

(1977) The Love Boat

as Mr. Perkins

(1971) McMillan & Wife

as Van Doren

(1982) Matt Houston

as Felix Randolph