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John Leeson

Acting • 1943-03-16 • Leicester, Leicestershire, England, UK

John Leeson (16 March 1943 — 1 November 2026) was a British actor, known for voicing K-9 on the television series Doctor Who from 1977–79, then from 1980–81, and returned for two single episodes in the revival 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

Doctor Who

Doctor Who

1963

Rainbow

Rainbow

1972

The Sarah Jane Adventures

The Sarah Jane Adventures

2007

K-9

K-9

2009

Tarka the Otter

Tarka the Otter

1979

K-9 and Company: A Girl's Best Friend

K-9 and Company: A Girl's Best Friend

1981

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From Nerdspin

Filmography

2025
The Doctor Who Escape Room: Team Third DoctorFilm
K9 (voice)
★ 10.0
2024
Darkness & Light: The Life of Graham WilliamsFilm
Self
2018
Doctor Who: Behind the SofaTV
Self • 8 episodes
2017
The Doctors: The Tom Baker YearsFilm
2015
Myth MakersTV
Himself • 1 episodes
2015
Longleat '83: The Lost FootageFilm
2013
The Five(ish) Doctors RebootFilm
Self
★ 7.8
2011
Pointless CelebritiesTV
K-9 (voice) • 1 episodes
★ 6.3
2009
K-9TV
K-9 (voice) • 26 episodes
★ 6.9
2008
Celebration: Doctor Who in 1983Film
2008
The K-9 FilesFilm
2007
The Sarah Jane AdventuresTV
K9 (voice) • 10 episodes
★ 7.1
2007
The Sarah Jane Adventures: Invasion of the BaneFilm
K9
★ 7.0
2007
Parrot FashionFilm
2007
A Matter of TimeFilm
2007
Getting Blood from the StonesFilm
2005
Doctor WhoTV
K9 (voice) • 2 episodes
★ 7.6
2004
A New BeginningFilm
2003
Doctor Who: ShadaFilm
K9 (voice)
★ 7.3
2001
Longleat '83: The Greatest Show in the GalaxyFilm
Himself - Host
★ 7.0
2000
LongitudeTV
BBC Producer • 1 episodes
★ 7.0
2000
K9 UnleashedFilm
★ 8.0
1998
Vanity FairTV
Priest • 1 episodes
★ 7.6
1998
Where on Earth Is Katy Manning?Film
★ 8.5
1995
BugsTV
Harris • 1 episodes
★ 6.8
1995
DowntimeFilm
Anthony the D.J.
★ 5.7
1993
Doctor Who: Dimensions in TimeFilm
K9 (voice)
★ 4.8
1990
Search Out SpaceFilm
K9 (voice)
★ 8.0
1989
Shadow of the NooseTV
Dickinson • 1 episodes
★ 9.0
1988
Doctor Who: Remembrance of the DaleksFilm
Dalek Battle Computer (voice)
★ 8.9
1987
Myth RunnerFilm
Himself
★ 10.0
1986
Whoops ApocalypseFilm
TV Interviewer
★ 5.6
1984
'Allo 'Allo!TV
Train's Cook • 1 episodes
★ 7.8
1983
Doctor Who: The Five DoctorsFilm
K9 (voice)
★ 7.8
1982
The Barretts of Wimpole StreetFilm
Henry Barrett
★ 9.0
1981
K-9 and CompanyTV
K-9 (voice) • 1 episodes
★ 6.3
1981
K-9 and Company: A Girl's Best FriendFilm
K-9 (voice)
★ 5.7
1981
Doctor Who: Warriors' GateFilm
K9 (voice)
★ 5.1
1980
Doctor Who: Full CircleFilm
K9 (voice)
★ 6.6
1980
Doctor Who: State of DecayFilm
K9 (voice)
★ 7.3
1980
Doctor Who: The Leisure HiveFilm
K9 (voice)
★ 7.0
1980
Doctor Who: MeglosFilm
K9 (voice)
★ 5.0
1979
MinderTV
Passport Officer • 1 episodes
★ 7.2
1979
Tarka the OtterFilm
Secretary of the Hunt
★ 6.8
1979
Doctor Who: The Armageddon FactorFilm
K-9 (voice)
★ 5.5
1979
JigsawTV
Jig • 25 episodes
★ 10.0
1979
Doctor Who: The Power of KrollFilm
Dugeen
★ 4.7
1978
Blake's 7TV
Pasco • 1 episodes
★ 7.3
1978
Blake's 7TV
Toise • 1 episodes
★ 7.3
1978
Doctor Who: The Androids of TaraFilm
K-9 (Voice)
★ 7.2
1978
Doctor Who: The Pirate PlanetFilm
K-9 (voice)
★ 7.0
1978
Doctor Who: The Stones of BloodFilm
K-9 (voice)
★ 7.8
1978
Doctor Who: The Ribos OperationFilm
K-9 (voice)
★ 6.8
1978
Doctor Who: The Invasion of TimeFilm
K9 (voice)
★ 6.2
1978
Doctor Who: UnderworldFilm
K-9 Mk. I (voice)
★ 5.2
1978
Merry Christmas Doctor WhoFilm
K9 (voice)
★ 10.0
1977
Doctor Who: The Invisible EnemyFilm
K-9 Mk. I (voice) / Nucleus (voice)
★ 7.2
1977
Doctor Who: The Sun MakersFilm
K9 Mk. I (voice)
★ 7.0
1975
Husband to Mrs. FitzherbertFilm
Clergyman
1972
RainbowTV
Bungle • 105 episodes
★ 6.8
1970
On the HouseTV
Young Man • 1 episodes
★ 6.0
1968
Dad's ArmyTV
Soldier • 1 episodes
★ 7.5
1968
The Spanish FarmTV
Lt Mansfield • 1 episodes
1963
Doctor WhoTV
K9 (voice) • 80 episodes
★ 7.9
1963
Doctor WhoTV
Dugeen • 4 episodes
★ 7.9
1963
Doctor WhoTV
Daleks (voice) • 2 episodes
★ 7.9