John Leeson
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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
Credits
Whoops Apocalypse (1986)
as TV Interviewer
Doctor Who: Full Circle (1980)
as K9 (voice)
Parrot Fashion (2007)
Actor
The Five(ish) Doctors Reboot (2013)
as Self
The Sarah Jane Adventures: Invasion of the Bane (2007)
as K9
Doctor Who: Meglos (1980)
as K9 (voice)
Tarka the Otter (1979)
as Secretary of the Hunt
Doctor Who: Shada (2003)
as K9 (voice)
Doctor Who: The Five Doctors (1983)
as K9 (voice)
Doctor Who: Underworld (1978)
as K-9 Mk. I (voice)
K-9 and Company: A Girl's Best Friend (1981)
as K-9 (voice)
Doctor Who: The Pirate Planet (1978)
as K-9 (voice)
Doctor Who: The Armageddon Factor (1979)
as K-9 (voice)
Doctor Who: Warriors' Gate (1981)
as K9 (voice)
A New Beginning (2004)
Actor
Doctor Who: Remembrance of the Daleks (1988)
as Dalek Battle Computer (voice)
A Matter of Time (2007)
Actor
Doctor Who: The Ribos Operation (1978)
as K-9 (voice)
Doctor Who: Dimensions in Time (1993)
as K9 (voice)
Doctor Who: The Leisure Hive (1980)
as K9 (voice)
Doctor Who: The Androids of Tara (1978)
as K-9 (Voice)
Downtime (1995)
as Anthony the D.J.
Doctor Who: The Power of Kroll (1979)
as Dugeen
Doctor Who: The Stones of Blood (1978)
as K-9 (voice)
Longleat '83: The Greatest Show in the Galaxy (2001)
as Himself - Host
Doctor Who: The Sun Makers (1977)
as K9 Mk. I (voice)
Doctor Who: State of Decay (1980)
as K9 (voice)
Doctor Who: The Invisible Enemy (1977)
as K-9 Mk. I (voice) / Nucleus (voice)
Doctor Who: The Invasion of Time (1978)
as K9 (voice)
The Doctors: The Tom Baker Years (2017)
Actor
Myth Runner (1987)
as Himself
Husband to Mrs. Fitzherbert (1975)
as Clergyman
Celebration: Doctor Who in 1983 (2008)
Actor
Longleat '83: The Lost Footage (2015)
Actor
Where on Earth Is Katy Manning? (1998)
Actor
Darkness & Light: The Life of Graham Williams (2024)
as Self
K9 Unleashed (2000)
Actor
Merry Christmas Doctor Who (1978)
as K9 (voice)
The K-9 Files (2008)
Actor
The Doctor Who Escape Room: Team Third Doctor (2025)
as K9 (voice)
The Barretts of Wimpole Street (1982)
as Henry Barrett
Getting Blood from the Stones (2007)
Actor
Search Out Space (1990)
as K9 (voice)