John Leeson
- Known for
- Acting
- Born
- 1 January 1943 · Leicester, Leicestershire, England, UK
John Leeson is a British actor who is known for voicing K-9 on the television series Doctor Who from 1977 to 1979, then from 1980 to 1981, and has returned for two single episode in the revived series. He also voiced K-9 in the show's spin-offs K-9 and Company, The Sarah Jane Adventures and K-9.
Known for
Acting 61
- 2026Doctor Who: The Time War as K-9
- 2025Doctor Who: Gallifrey
- 2025The Doctor Who Escape Room: Team Third Doctor as K9 (voice)
- 2024Darkness & Light: The Life of Graham Williams as Self
- 2017The Doctors: The Tom Baker Years
- 2015Longleat '83: The Lost Footage
- 2013Doctor Who and the Shada Man as K9 (voice)
- 2013The Five(ish) Doctors Reboot as Self
- 2013Doctor Who: Gallifrey as The Prince
- 2013Ian Levine: Downtime Redux as Anthony
- 2010The Sarah Jane Adventures: Goodbye, Sarah Jane Smith as K9 (voice)
- 2010The Sarah Jane Adventures: The Nightmare Man as K9 (voice)
- 2009The Sarah Jane Adventures: The Gift as K9 (voice)
- 2009The Sarah Jane Adventures: Mona Lisa's Revenge as K9 (voice)
- 2009The Sarah Jane Adventures: The Wedding of Sarah Jane Smith as K9 (voice)
- 2009The Sarah Jane Adventures: The Mad Woman in the Attic as K9 (voice)
- 2009The Sarah Jane Adventures: From Raxacoricofallapatorius with Love as K9 (voice)
- 2009All Aboard the Starliner: The Making of 'Full Circle' as Self
- 2009K-9 in E-Space as Self
- 2008The K-9 Files
- 2008Dreams and Fantasy: Making 'The Invisible Enemy' as Self
- 2008Out of Time as Self
- 2008Celebration: Doctor Who in 1983
- 2007The Sarah Jane Adventures: The Lost Boy as K9 (voice)
- 2007Parrot Fashion
- 2007Getting Blood from the Stones
- 2007A Matter of Time
- 2007The Sarah Jane Adventures: Invasion of the Bane as K9
- 2004A New Beginning
- 2003Doctor Who: Shada as K9 (voice)
- 2001Longleat '83: The Greatest Show in the Galaxy as Himself - Host
- 2000K9 Unleashed
- 1998Where on Earth Is Katy Manning?
- 1995Downtime as Anthony the D.J.
- 1993Doctor Who: Dimensions in Time as K9 (voice)
- 1990Search Out Space as K9 (voice)
- 1988Doctor Who: Remembrance of the Daleks as Dalek Battle Computer (voice)
- 1987Myth Runner as Himself
- 1986Whoops Apocalypse as TV Interviewer
- 1984Myth Makers 2: John Leeson
- 1983Doctor Who: The Five Doctors as K9 (voice)
- 1982The Barretts of Wimpole Street as Henry Barrett
- 1981K-9 and Company: A Girl's Best Friend as K-9 (voice)
- 1981Doctor Who: Warriors' Gate as K9 (voice)
- 1980Doctor Who: State of Decay as K9 (voice)
- 1980Doctor Who: Full Circle as K9 (voice)
- 1980Doctor Who: Meglos as K9 (voice)
- 1980Doctor Who: The Leisure Hive as K9 (voice)
- 1979Tarka the Otter as Secretary of the Hunt
- 1979Doctor Who: The Armageddon Factor as K-9 (voice)
- 1979Doctor Who: The Power of Kroll as Dugeen
- 1978Merry Christmas Doctor Who as K9 (voice)
- 1978Doctor Who: The Androids of Tara as K-9 (Voice)
- 1978Doctor Who: The Stones of Blood as K-9 (voice)
- 1978Doctor Who: The Pirate Planet as K-9 (voice)
- 1978Doctor Who: The Ribos Operation as K-9 (voice)
- 1978Doctor Who: The Invasion of Time as K9 (voice)
- 1978Doctor Who: Underworld as K-9 Mk. I (voice)
- 1977Doctor Who: The Sun Makers as K9 Mk. I (voice)
- 1977Doctor Who: The Invisible Enemy as K-9 Mk. I (voice) / Nucleus (voice)
- 1975Husband to Mrs. Fitzherbert as Clergyman