Content overview: “John Leeson, Voice of Doctor Who's K-9, Dies at 83”. John Leeson, the actor best known for voicing the robotic dog K-9 on the long-running BBC series Doctor Who, has died at the age of 83. Leeson passed away on Sunday, November 1, 2026, leaving behind a legacy that spans decades of science fiction television. Leeson first brought K-9 to life in 1977,
Leeson first brought K-9 to life in 1977, during Tom Baker's tenure as the Fourth Doctor. The character, a mobile computer with a dog-like design, quickly became a fan favorite for its loyalty, dry wit, and memorable catchphrase, "Affirmative." Leeson's vocal performance gave the mechanical companion a distinct personality that resonated with audiences of all ages. Beyond Doctor Who, Leeson reprised his role in spin-offs such as K-9 and Company and The Sarah Jane Adventures, cementing K-9's place in the wider Whoniverse. For the complete material, the listing points back to the source inside the network.