John Leeson, best known for voicing the robot dog K9 in Doctor Who, has died at 83. Source: theguardian.com.
What Happened
Leeson’s son, Guy Ducker, shared the news on Facebook. He wrote: "I regret to announce the death of my father… after a summer of illness. The end was peaceful."
In another post, Ducker thanked fans for their support. "Many thanks to the Whovian community for the love they showed to my father over the decades — it meant a lot to him and me."
Key Facts
- John Leeson was born John Ducker in 1943.
- He trained at the Royal Academy of Dramatic Art (Rada).
- He appeared in TV shows like Dad’s Army, Sorry!, Crown Court, and Longitude.
- He worked as a continuity announcer on Channel 4.
- He returned to voice K9 in the 20th anniversary special of Doctor Who and in the spin-off K-9 and Company.
- He reappeared in a 2006 episode with Sarah Jane Smith, played by Elisabeth Sladen.
How K9 Was Created
K9 was created by Bob Baker and Dave Martin. It debuted in 1977 in the Tom Baker episode The Invisible Enemy.
At first, the script was meant for just one story. But the team saw strong interest, especially from younger viewers. They decided to make K9 a regular part of the show.
John Leeson voiced K9 during the original run. He introduced the phrase "Affirmative, Master" — a line that became instantly recognizable and widely imitated.
David Brierly briefly took over the role in the 1980s. But Leeson returned when K9 came back, keeping the original tone and style.
Personal Reflections
Former Doctor Who showrunner Russell T Davies said in an Instagram post: "There was no question we’d ask John to provide the voice" when K9 returned. "A posh dog, uppity, haughty, wry, but somehow innocent too, and so funny. Pitched perfectly so that kids could impersonate him. That’s not easy. A true gent, and a great loss."
Keith Barnfather, who worked with Leeson in the 1980s and produces behind-the-scenes documentaries, called him "kind, considerate, professional, charming, talented, and unassuming."
Lisa Bowerman, who has worked across Doctor Who productions, said: "He was an utterly lovely man, excellent company, and — I don’t hesitate to use this word for once — a truly iconic voice."
Early Career and Challenges
After school, Leeson worked as a hospital porter before joining Rada. In interviews, he said: "Half of my career has been as a stage actor. The TV part came mostly by accident."
He played Bungle on the children’s show Rainbow. He recalled: "I was poured out of this costume every evening into a taxi" because studio work under hot lights left him "really ill inside this bear suit."
He also remembered a moment on Dad’s Army: "I was livid because they gave me an army haircut, a real basin job, and then put me in a balaclava and tin hat — so nobody could see the hair anyway."
Legacy and Ongoing Work
Leeson stayed connected to Doctor Who well into the 2020s.
He once said: "Under no circumstances would there be anything after the first episode has been shot and is in the can. So don’t expect too much. And here I am in 2025 still attached to Doctor Who … I got to meet a tremendous number of knees doing K9."
His voice and presence remain a key part of the show’s legacy. Fans remember not only his distinctive delivery but also his warmth, professionalism, and love for acting.
Sources & further reading
Featured image: original publisher image. Via original publisher. Image source
