Walker (Tardisode 8)

Walker was the captain of the Sanctuary Base 6 crew. He signed a deal with Macmillin to get the power source preventing Krop Tor from falling into the black hole K37 Gem 5. (TS: Tardisode 8) Walker died when the expedition's ship crashlanded. Zachary Cross Flane took over as acting captain of his expedition. (TV: The Impossible Planet)