
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.

Myth Runner

The Doctor Who Escape Room: Team Third Doctor

Merry Christmas Doctor Who

Doctor Who: Remembrance of the Daleks

Where on Earth Is Katy Manning?

K9 Unleashed

Search Out Space

Doctor Who

The Five(ish) Doctors Reboot

Doctor Who: The Stones of Blood

'Allo 'Allo!

Doctor Who: The Five Doctors

ドクター・フー

Vanity Fair

Doctor Who: State of Decay

Dad's Army

Doctor Who: Shada

Blake's 7

The Sarah Jane Adventures: Invasion of the Bane

Doctor Who: The Androids of Tara

Doctor Who: The Invisible Enemy

サラ・ジェーン・アドベンチャー

Doctor Who: The Sun Makers

Doctor Who: The Leisure Hive

Doctor Who: The Pirate Planet

Doctor Who: Gallifrey

Longitude

K-9

Doctor Who: The Ribos Operation

Minder

Bugs

Tarka the Otter

Rainbow

Pointless Celebrities

Doctor Who: Full Circle

Doctor Who: The Invasion of Time

Sorry!

K-9 and Company

The Sarah Jane Adventures: From Raxacoricofallapatorius with Love

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

Whoops Apocalypse

Doctor Who: The Armageddon Factor

Doctor Who: Warriors' Gate

Doctor Who: Underworld

Downtime

Doctor Who: Meglos

Doctor Who: The Power of Kroll

Doctor Who: Dimensions in Time

Longleat '83: The Lost Footage

The Doctors: The Tom Baker Years

Celebration: Doctor Who in 1983

Longleat '83: The Greatest Show in the Galaxy

The Barretts of Wimpole Street

A Matter of Time

A New Beginning

The K-9 Files

Parrot Fashion

Getting Blood from the Stones

Doctor Who and the Shada Man

Darkness & Light: The Life of Graham Williams

Myth Makers

Doctor Who: Behind the Sofa

Shadow of the Noose