As the forces of evil mass, the Doctor, Yaz and Dan face perilous journeys and seemingly insurmountable obstacles in their quest for survival.
Runtime: 51
Starts: Jodie Whittaker, Mandip Gill, Jemma Redgrave, John Bishop, Silas Carson, Kevin McNally, Barbara Flynn, Craig Parkinson, Robert Bathurst, Craige Els, Thaddea Graham, Jacob Anderson