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
• Bradley Walsh
• Mandip Gill
• Tosin Cole
• Charlotte Ritchie
• Nikesh Patel
• Daniel Adegboyega
• Nicholas Briggs