Gareth Thomas
- Blake's Seven
2018
- Made in Romania
2010 Gary Devane
- Personal Affairs
2009 Leo Hartmann
- M.I. High
2007 Patrick Houston
- Torchwood
2006 Ed Morgan
- Distant Shores
2005 Charles McCallister
- Hamlet
2003 Claudius
- Harold Shipman: Doctor Death
2002 Rev Denis Thomas
- Possessions
2001 Inspector Sabworth
- Baddiel's Syndrome
2001 Colin
- The Strangerers
2000 Police Sergeant
- Midsomer Murders
1997 Huw Mostyn
- The Witch's Daughter
1996 Dan Mackay
- Crown Prosecutor
1995 Harry Thomsen
- Sparrow
1994 Corrado
- Waterland
1992 Publican
- Heartbeat
1992 Nathaniel Clegghorn
- Maigret
1992
- The Chestnut Soldier
1991 Idris Llewelyn
- Emlyn's Moon
1990 Idris Llewelyn
- Chelworth
1989 Peter Thornton
- Blake's 7: Duel
1986 Roj Blake
- Blake's 7: Orac
1986 Roj Blake
- Casualty
1986 Jim Bailey
- Blake's 7: The Beginning
1985 Roj Blake
- Sherlock Holmes
1984 Joseph Harrison
- Morgan's Boy
1984 Morgan Thomas
- Love and Marriage
1984 Stephen
- Strangers and Brothers
1984 Arthur Mounteney
- The Adventures of Sherlock Holmes
1984 Joseph Harrison
- Bewitched
1983 Owen Bosworth
- Taggart
1983
- The Citadel
1983 Dr. Philip Denny
- Shades of Darkness
1983 Owen Bosworth
- Dramarama
1983 Long John Silver
- Dogfood Dan and the Carmarthen Cowboy
1982 Aubrey
- The Bell
1982 James Tayper Pace
- Bergerac
1981 Towers
- Peter and Paul
1981 Julius
- Visitor from the Grave
1980 Richard/Gupta
- Hammer House of Horror
1980 Richard / Gupta
- Tales of the Unexpected
1979 Telfer
- Border Country
1979 Evan ap Evan
- Blake's 7
1978
- Blasphemy at the Old Bailey
1977 G. Robertson
- Gotcha / Campion's Interview
1977 Ton
- Children of the Stones
1977 Adam Brake
- Star Maidens
1976 Shem
- Victorian Scandals
1976 William Makepeace Thackeray
- Breath
1975 Rodney Hamer
- Shadows
1975 Benson
- How Green Was My Valley
1975 Reverend Merddyn Gruffydd
- Dummy Run
1974 Commentator
- Smokey Joe's Revenge
1974 P.C. Grundy
- Juggernaut
1974 Liverpool Joiner
- David Copperfield
1974 Edward Murdstone
- Churchill's People
1974 Laurence Kemys
- Mafia Junction
1973 Trenchcoated Detective (uncredited)
- Sutherland's Law
1973 Alec Duthie
- Centre Play
1973 Commentator
- Stocker's Copper
1972 Herbert Griffin
- The Ragman's Daughter
1972 Tom
- The Watercress Girl
1972 Frank Oppidan
- Sutherland's Law
1972 Alec Duthie
- The Sextet
1972
- Country Matters
1972 Frank Oppidan
- Justice
1971 Gordon Mostyn
- Play for Today
1970
- Parkin's Patch
1969 Ron Radley
- Zigger Zagger
1967
- Quatermass and the Pit
1967 Workman (uncredited)
- ITV Playhouse
1967 Schmidt
- Public Eye
1965 Briggs
- Hallmark Hall of Fame
1951 Achillas
