1997

as Cullen Carswell

1996

as Himself - Host

1995		Baywatch Nights (1 episode) as Dr. Lancaster
1995		Hart to Hart: Secrets of the Hart

1994

(1 episode) as Spencer Smythe (voice)

1991

as Devon Miles

1989

as Host

1988		Secrets of the Unknown: Dreams and Nightmares as Host
1988		Secrets of the Unknown: Witches as Host
1988		Secrets of the Unknown: Poltergeists as Host

1987		Secrets of the Unknown: Lake Monsters as Host
1987		Secrets of the Unknown: Tornadoes as Host
1987		Secrets of the Unknown: Life After Death as Host
1987		Secrets of the Unknown: Pearl Harbor as Host
1987		Secrets of the Unknown: Amelia Earhart as Host
1987		Secrets of the Unknown: Curses as Host
1987		Secrets of the Unknown: Hollywood Hauntings as Host
1987		Secrets of the Unknown: Jack the Ripper as Host
1987		Secrets of the Unknown: Nostradamus as Host
1987		Secrets of the Unknown: Big Foot as Host
1987		Secrets of the Unknown: The Titanic as Host
1987		B-17: The Flying Fortress as Narrator
1987		U-Boats: The Wolfpack as Narrator

1985		MacGyver (1 episode) as Guy Roberts
1985		Knight Rider: Halloween Knight as Devon Miles

1984

(1 episode) as Julian Lord (1 episode) as Richard Bennett

1982		Matt Houston (1 episode) as Malcolm James Abercrombie
1982		Knight Rider (84 episodes) as Devon Miles
1982		Knight Rider: Knight of the Phoenix as Devon Miles
1982		Hotel (1 episode)
1982		MegaForce as Byrne-White

1979

(1 episode) as Arthur Sydney

1978

(1 episode) as John

1977

(1 episode) as Colin Berne

1975

(1 episode) as Myles Prescott

1973

as Narrator

1972		The Streets of San Francisco (1 episode) as Brian Downing (1 episode) as Amory Gilliam
1972		Search (1 episode)

1971

(1 episode)

1969

as Alex MacLaughlin

1968

(50 episodes) as Captain Daniel Gregg

1967		Cowboy in Africa (1 episode) as Brian Hilliard
1967		Custer (1 episode)
1967		Caprice as Sir Jason Fox

1966		Eye of the Devil as Jean-Claude Ibert
1966		The Girl from U.N.C.L.E. (1 episode)
1966		Our Man Flint as Malcolm Rodney

1965		The F.B.I. (1 episode) as Otto Strasser (1 episode) as Major Damian Sava
1965		Convoy (1 episode)
1965		Run for Your Life (1 episode) as Clive Darrell
1965		Von Ryan's Express as Captain Costanzo

1964		Signpost to Murder as Dr. Mark Fleming
1964		Daniel Boone (1 episode) as Col. Burton (1 episode) as Col. Marcus Worthing (1 episode) as Adm. Lord Clydesdale
1964		12 O'Clock High (1 episode) as Kurt Halland (1 episode) as Col. Gert Schotten

1963		Mr. Novak (1 episode) as Rand Hardy
1963		The Outer Limits (1 episode) as Professor Mathers

1961

(1 episode) as Self

1955		Hill 24 Doesn't Answer as James Finnegan
1955		The Adventures of Robin Hood (1 episode) as First Soldier (1 episode) as Courtier (1 episode) as Foppish Lord (1 episode) as Steward / Outlaw (1 episode) as Baron Mornay / Outlaw (1 episode) as Lieutenant Howard (1 episode) as Le Blond (1 episode) as Man-at-arms (1 episode) as Ulf

1950

(1 episode) as Self - Panelist

1948		Studio One (1 episode) as Liam O'Neill
1948		The Ed Sullivan Show (3 episodes) as Self

1947

(2 episodes)