- And Mrs.
2024 Derek
- Our Father
2024
- Truelove
2024 David
- I Could Never Go Vegan
2024 Executive Producer
- Remembers…
2022
- The Spanish Princess
2019 Thomas Howard
- Hold the Sunset
2018 Mr. Dugdale
- National Theatre Live: The Seagull
2016 Sorin
- Our Ex-Wife
2016 George
- Unforgotten
2015 Martin
- Grantchester
2014 Archie Johnson
- National Theatre Live: People
2013 Theodore
- American Cafe
2010 Himself
- Downton Abbey
2010 Hugh 'Shrimpie' MacClare
- Moving On
2009 Eric
- Death at a Funeral
2007 Victor
- Home Again
2006
- Man to Man
2005 Gyllenhaal
- The Wedding Date
2005 Victor Ellis
- Whatever Love Means
2005 Prince Philip
- Jericho
2005 Philip Pickering
- Medium
2005 Writer
- Over There
2005 Writer
- The I Inside
2004 Doctor Truman
- Postcards from Buster
2004 Writer
- Medical Investigation
2004 Writer
- More Great Comedy Moments
2003 Paul Ryman (archive footage)
- Playmakers
2003 Writer
- The King's Beard
2002 King Cuthbert (voice)
- The Inspector Lynley Mysteries
2002 Dr. Trenarrow
- 2001: A Space Travesty
2000 Dr. Griffin Pratt
- Cry Wolf
2000 Dr Anthony Hook
- Pierre Bonnard: A Love Exposed
1998 Narrator
- The Cater Street Hangman
1998 Edward Ellison
- The Ambassador
1998
- Bean
1997 Lord Walton
- Gobble
1997 Peter Villiers
- Midsomer Murders
1997 Norman Swanscombe
- Breaker High
1997 Writer
- The Peacock Spring
1996 Sir Edward Gwithian
- The Man Who Didn't Believe in Ghosts
1995 Richard Cramer
- Chiller
1995 Richard Cramer
- MacGyver: Trail to Doomsday
1994 Frederick
- The Secret World of Alex Mack
1994 Writer
- Sweet Valley High
1994 Writer
- A Touch of Frost
1992 Richard Darrow
- The Price of the Bride
1990 Dennis Guant
- The Chief
1990 Simon Duval
- Joint Account
1989
- The Ruth Rendell Mysteries
1987 Rev. Henry Archery
- A Perfect Spy
1987 Magnus Pym
- Paradise Postponed
1986 Henry Simcox
- Paradise Postponed
1986 George Augustus Simcox
- A Woman of Substance
1985 Adam Fairley
- To Catch a King
1984 Heydrich
- A Taste of Honey
1984 Peter
- A Taste of Honey
1984 Peter
- Arms and the Man
1983 Sergius
- Reilly: Ace of Spies
1983 Fothergill
- Strangled
1982 Steve Baker
- Saturday Night Thriller
1982 Steve Baker
- Chariots of Fire
1981 Duke of Sutherland
- Dear Brutus
1981 Purdie
- Tales of the Unexpected
1979 Keith
- Prince Regent
1979 George, Prince of Wales / King George IV
- The Copyist
1978 The Copyist
- Lillie
1978 Oscar Wilde
- The Kitchen
1977 Peter
- BBC2 Play of the Week
1977 Peter
- The Velvet Glove
1977 Eddy
- The Lifeswappers
1976 Bunny/Trevor/Miss Trevor/Dinah
- Beloved
1976 Henry James Prince
- Victorian Scandals
1976 Henry James Prince
- Plays for Britain
1976 Bunny / Trevor / Miss Trevor / Dinah
- Hennessy
1975 Williams
- The Love School
1975 John Everett Millais
- Callan
1974 Toby Meres
- The Inheritors
1974 Michael Gethin
- Zodiac
1974 Tony Weston
- The Hireling
1973 Captain Hugh Cantrip
- The Organization
1972 Richard Pershore
- One Brief Summer
1971
- Elizabeth R
1971 Earl of Southampton
- The Rivals
1970 Faulkland
- Play for Today
1970 Purdie
- W. Somerset Maugham
1969 Tito
- Big Breadwinner Hog
1969 Hog
- Cold Comfort Farm
1968 Seth Starkadder
- ITV Playhouse
1967 Peter Morris
- BBC Play of the Month
1965 Faulkland
- The Troubleshooters
1965 Reporter
