As the new year begins, a terrifying evil from across the centuries of Earth's history is stirring. As the Doctor, Ryan, Graham and Yaz return home, will they be able to overcome the threat to planet Earth?
Jodie Whittaker
The Doctor
Bradley Walsh
Graham O'Brien
Mandip Gill
Yasmin Khan
Tosin Cole
Ryan Sinclair
Charlotte Ritchie
Lin
Nikesh Patel
Mitch
Daniel Adegboyega
Aaron
Nicholas Briggs
Dalek (voice)
