1990

(1 episode) as William Unger

1989

(1 episode) as Colonel Klink (voice)

1986

(1 episode)

1982

(1 episode)

1978

(1 episode)

1977		The Love Boat (1 episode) as Mr. Perkins
1977		Tabitha (1 episode)
1977		The Rhinemann Exchange (3 episodes) as Franz Altmuller

1971

(1 episode) as Dr. Ernest Bleeker (1 episode) as Van Doren

1970

(1 episode)

1968

(1 episode) as Werner Klemperer

1967

(4 episodes) as Self

1966

(1 episode) as Colonel Klink

1965		Hogan's Heroes (168 episodes) as Wilhelm Klink
1965		Lost in Space (1 episode) as Bolix

1963		Bob Hope Presents the Chrysler Theatre (1 episode) as Colonel Wertha
1963		The Dakotas (1 episode)

1962

(3 episodes)

1960		The Case of the Dangerous Robin (1 episode) as Jan Hoveen
1960		Peter Loves Mary (1 episode)
1960		The Islanders (1 episode) as Michel Serati
1960		Checkmate (1 episode) as Franz Leder
1960		Thriller (1 episode) as Mr. Clark

1959		Adventures in Paradise (1 episode) as Kuberli
1959		The Alaskans (1 episode)
1959		The Third Man (1 episode)
1959		Men into Space (1 episode)
1959		One Step Beyond (1 episode) as Herr Bautmann
1959		Rawhide (1 episode)

1957		Maverick (1 episode) as Alex Jennings
1957		Perry Mason (1 episode) as Police Insp. Hurt (1 episode) as Ulric Zenas (1 episode) as Stefan Riker
1957		M Squad (1 episode) as Heinrich Ronn
1957		The Thin Man (1 episode)
1957		Have Gun, Will Travel (2 episodes)

1956		Playhouse 90 (1 episode) as Emil Hahn
1956		Wire Service (1 episode) as Krylov
1956		Tony Awards (1 episode) as Self - Nominee

1955		Matinee Theater (1 episode)
1955		Alfred Hitchcock Presents (1 episode) as Mr. Ranks (1 episode) as Professor Klopka / Captain Kriza
1955		Navy Log (1 episode)
1955		Gunsmoke (1 episode) as Clifton Bunker

1954		Climax! (2 episodes)
1954		Studio 57 (1 episode)

1953

(1 episode) as Mr. Muller

1952

(2 episodes)

1948

(2 episodes) (2 episodes) as Leopold