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)
The Doctor (1)
The Captain
Bill Potts
The Glass Woman
German Soldier
Polly
Ben
Clara Oswald
Nardole
Daleks (voice)
The Doctor (13)
The Doctor (1) (archive footage)
Polly (archive footage)
Ben (archive footage)
The Doctor (2) (archive footage)
