John Leeson Dies at 83 After Summer of Illness
John Leeson, the actor known as the voice of the robotic dog K9 in Doctor Who, has died at the age of 83. Leeson was born John Francis Christopher Ducker on March 16, 1943, in Stoneygate, Leicester, and trained at Rada before building a career across British stage and screen.
The announcement prompted an outpouring of tributes from across the entertainment industry and the science fiction community. Former Doctor Who showrunner Russell T Davies posted on Instagram to praise the actor’s performance, describing him as a “true gent” and a “fine, fine actor.” “When we brought K9 back in 2006, there was no question that we’d ask John to provide the voice,” Davies wrote, highlighting the character’s unique blend of haughtiness and innocence.
Creating the Voice of K9 in The Invisible Enemy
Leeson first stepped into the role of K9 in 1977 during the Fourth Doctor serial The Invisible Enemy, starring Tom Baker and created by Bob Baker and Dave Martin. Although the metallic canine was initially written for a single script, producers decided to retain the character as a regular companion to appeal to younger viewers. Leeson stayed with the TARDIS crew until 1981, establishing the catchphrase “Affirmative, Master” and cementing a legacy that spanned decades of audio dramas and television appearances.
We are very sad to hear of the passing of John Leeson, known and loved by #DoctorWho fans since 1977 as the voice of the Doctor's robotic companion K-9. ❤️❤️ pic.twitter.com/2UcUv5ZDVg
Beyond his work alongside the Doctor, Leeson’s television career included roles in classic British series such as Dad’s Army, Blake’s 7, The Bill, Crown Court, and Sorry!, alongside a stint as a Channel 4 continuity announcer. He also portrayed the original Bungle the bear in the children’s television programme Rainbow. In recent years, Leeson continued his connection to the Doctor Who universe by recording audio adventures with Big Finish and working alongside Tom Baker on AUK Studios’ Sir Sherlock audio dramas.
Family Legacy and Tributes Across the Whovian Community
Following his death on November 1, 2026, tributes poured in from colleagues who worked alongside him. Lisa Bowerman remembered him as an utterly lovely man and a truly iconic voice. Barnaby Eaton-Jones, working on upcoming audio projects with Leeson’s wife Judy Griffiths, noted that the actor was actively performing right up until his final months. Leeson is survived by his son Guy Ducker and his wife Judy Griffiths, whom he married in 1969.
Frequently Asked Questions About John Leeson and K9
When did John Leeson first appear on Doctor Who?
John Leeson first appeared on Doctor Who in 1977 during the Tom Baker-led story The Invisible Enemy, voicing the robotic dog K9.
Who confirmed John Leeson’s passing and when did it occur?
His son, Guy Ducker, confirmed the news on Facebook, stating that Leeson died peacefully at 3:03 pm on November 1, 2026, following a summer of illness.
What other famous children’s television character did John Leeson voice?
Leeson played the original Bungle the bear in the children’s series Rainbow.
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