Doctor Who

BBC1, 6.45pm It’s going to be a bittersweet episode for fans, as it sees the return of John Barrowman as Captain Jack Harkness, but will also be a farewell to Bradley Walsh and Tosin Cole. As the instalment begins, Yaz, Ryan and Graham are trying to get on with their lives on Earth, while the Doctor (Jodie Whittaker, left) is in a high-security alien prison. But matters get tough when they discover a sinister plan is forming involving a Dalek.