He decided to step away to allow for more creative minds to take charge of the show.
The screenwriter and producer was responsible for reviving the sci-fi classic and brought it back to television in 2005.
Russell was also the showrunner behind spin-offs such as The Sarah Jane Adventures, with the late Elisabeth Sladen reprising her iconic role, and Torchwood led by Captain Jack Harkness star John Barrowman.
With current showrunner Chris Chibnall leaving the role at the end of 2022, Russell will be returning to the helm in the upcoming series.
Doctor Who is available to watch on BBC iPlayer.