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.

Cast:Peter Capaldi, David Bradley, Mark Gatiss, Pearl Mackie, Nikki Amuka-Bird, Toby Whithouse,

Genre:Science Fiction, Adventure,

country:United Kingdom,

Production:BBC,