Doctor Who: Twice Upon a Time

As the Twelfth Doctor nears regeneration, he stumbles on his first incarnation, also refusing to change. It takes a captain, a glass avatar and a familiar face to convince the Doctors the universe still needs them.

• Director: Rachel Talalay
• Cast: Peter Capaldi, David Bradley, Mark Gatiss, Pearl Mackie, Nikki Amuka-Bird, Toby Whithouse, Lily Travers, Jared Garfield