 It also stars Bradley Walsh, Tosin Cole and Mandip Gill as the Doctor's travelling companions, Graham O'Brien, Ryan Sinclair and Yasmin Khan, respectively.The series follows the Thirteenth Doctor and her companions as they meet a new incarnation of the Master and his destruction of Gallifrey, the return of Jack Harkness, the appearance of an unknown incarnation of the Doctor from before the Time War, the Cybermen, and the secret of the "Timeless Child".The ten episodes were directed by Jamie Magnus Stone, Lee Haven Jones, Nida Manzoor and Emma Sullivan.