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