John Leeson
- The Doctor Who Escape Room: Team Third Doctor
2025 K9 (voice)
- Myth Makers
2015 Himself
- Pointless Celebrities
2011 K-9 (voice)
- K-9
2009 K-9 (voice)
- The K-9 Files
2008
- A Matter of Time
2007
- Parrot Fashion
2007
- The Sarah Jane Adventures
2007 K9 (voice)
- Doctor Who
2005 K9 (voice)
- A New Beginning
2004
- Doctor Who: Shada
2003 K9 (voice)
- Longleat '83: The Greatest Show in the Galaxy
2001 Himself - Host
- K9 Unleashed
2000
- Longitude
2000 BBC Producer
- Vanity Fair
1998 Priest
- Downtime
1995 Anthony the D.J.
- Bugs
1995 Harris
- Doctor Who: Dimensions in Time
1993 K9 (voice)
- Search Out Space
1990 K9 (voice)
- Shadow of the Noose
1989 Dickinson
- Doctor Who: Remembrance of the Daleks
1988 Dalek Battle Computer (voice)
- Myth Runner
1987 Himself
- Whoops Apocalypse
1986 TV Interviewer
- 'Allo 'Allo!
1984 Train's Cook
- Doctor Who: The Five Doctors
1983 K9 (voice)
- The Barretts of Wimpole Street
1982 Henry Barrett
- Doctor Who: Warriors' Gate
1981 K9 (voice)
- K-9 and Company: A Girl's Best Friend
1981 K-9 (voice)
- K-9 and Company
1981 K-9 (voice)
- Doctor Who: Meglos
1980 K9 (voice)
- Doctor Who: The Leisure Hive
1980 K9 (voice)
- Doctor Who: Full Circle
1980 K9 (voice)
- Doctor Who: State of Decay
1980 K9 (voice)
- Tarka the Otter
1979 Secretary of the Hunt
- Doctor Who: The Armageddon Factor
1979 K-9 (voice)
- Doctor Who: The Power of Kroll
1979 Dugeen
- Minder
1979 Passport Officer
- Jigsaw
1979 Jig
- Doctor Who: The Ribos Operation
1978 K-9 (voice)
- Doctor Who: The Invasion of Time
1978 K9 (voice)
- Doctor Who: Underworld
1978 K-9 Mk. I (voice)
- Doctor Who: The Stones of Blood
1978 K-9 (voice)
- Doctor Who: The Androids of Tara
1978 K-9 (Voice)
- Doctor Who: The Pirate Planet
1978 K-9 (voice)
- Merry Christmas Doctor Who
1978 K9 (voice)
- Blake's 7
1978 Toise
- Doctor Who: The Invisible Enemy
1977 K-9 Mk. I (voice) / Nucleus (voice)
- Doctor Who: The Sun Makers
1977 K9 Mk. I (voice)
- Husband to Mrs. Fitzherbert
1975 Clergyman
- Rainbow
1972 Bungle
- On the House
1970 Young Man
- Dad's Army
1968 Soldier
- The Spanish Farm
1968 Lt Mansfield
- Doctor Who
1963 K9 (voice)
