Acting

2007

as Manny (voice) (archive footage)

2001

as The Professor (voice)

2000

(2 episodes) as Era (voice)

1999

as Geri the Cleaner (voice)

1998		A Bug's Life as Manny (voice)
1998		Toonsylvania (21 episodes)
1998		Lost In Space Forever as Self (also archive footage)

1997		Channel Umptee-3 (13 episodes) as Stickley Rickets (voice)
1997		The Angry Beavers (1 episode)

1996

(1 episode) as Julian Frey (voice)

1995

(6 episodes) as Professor Jones (voice)

1994

(2 episodes) as Miles Warren / The Professor (voice)

1993

(13 episodes) as (voice)

1990

(13 episodes)

1989

as Sunflower (voice)

1987		Visionaries: Knights of the Magical Light (13 episodes)
1987		Pinocchio and the Emperor of the Night as Grumblebee (voice)

1986

as Host

1985

as Count Blogg (voice)

1979

(1 episode)

1978		Vega$ (1 episode)
1978		Battlestar Galactica (6 episodes) as Lucifer (voice) (1 episode) as Lucifer
1978		Last of the Good Guys as Dr. Cropotkin

1977

(15 episodes)

1976		Ark II (1 episode)
1976		Monster Squad (1 episode) as The Astrologer

1973		My Favorite Martians (16 episodes) as Uncle Martin (voice)
1973		Lost in Space as Dr. Zachary Smith

1972

(1 episode)

1971		Funny Face (1 episode)
1971		Once Upon a Dead Man as Mr. Wortzel

1970

(1 episode) as Prof. Nicholas Porteus

1969

(1 episode) as Hollister

1968		Lancer (1 episode)
1968		Land of the Giants (1 episode) as Mr. Piper
1968		The Three Musketeers (19 episodes)
1968		The Three Musketeers (18 episodes) as Athos

1965		Get Smart (1 episode)
1965		Lost in Space (83 episodes) as Dr. Zachary Smith

1964		Bewitched (2 episodes)
1964		The Rogues (1 episode) as Paul Duval

1963

(42 episodes)

1960

(1 episode)

1959		The Twilight Zone (1 episode) as George Alfred (1 episode) as Doctor
1959		The Third Man (77 episodes)
1959		Bonanza (1 episode) as Charles Dickens
1959		The Big Fisherman as Lysias

1957

(3 episodes)

1956

(1 episode)

1954

(1 episode) as Fritz Weiser

1953

(1 episode) as Trapollini (1 episode) as Fouresh (1 episode) as Favier (1 episode) as Hong Kong Sam

1952		Botany Bay as Tom Oakly
1952		Omnibus (2 episodes)

1951		Hallmark Hall of Fame (1 episode) as Exton (1 episode) as Legendre
1951		Schlitz Playhouse of Stars (1 episode) as Popeau

1949

(2 episodes)

1948

(1 episode) as Master of Ceremonies (1 episode) as Dr. Wetheril (1 episode) as Mr. Dickinson