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.
The Doctor (12)
Peter Capaldi
The Doctor (1)
David Bradley
The Captain
Mark Gatiss
Bill Potts
Pearl Mackie
The Glass Woman
Nikki Amuka-Bird
German Soldier
Toby Whithouse
Polly
Lily Travers
Ben
Jared Garfield
Clara Oswald
Jenna Coleman
Nardole
Matt Lucas
Daleks (voice)
Nicholas Briggs
The Doctor (13)
Jodie Whittaker
The Doctor (1) (archive footage)
William Hartnell
Polly (archive footage)
Anneke Wills
Ben (archive footage)
Michael Craze
The Doctor (2) (archive footage)
Patrick Troughton