Heart of the Daleks was a Series that aired for 7 episodes from December 30th, 2017 to February 10th, 2018. While set in the Doctor Who universe, it is not part of the main series and serves as a pilot for a spin off featuring Millie Bobby Brown's character, Generation: War. Lara Pulver, however, will take over from Peter Capaldi full time in the Spring in a full series of Doctor Who.