Mortally wounded in battle, he could see no reason to go on.
He was willing to die a final death.
But a surprise, time-twisting encounter with his oldest self, the first Doctor, led him to recover his desire to go on – to start again.
It’s time for change. For regeneration.
And the Doctor has a few things to say to the Doctor that is to come.
For in his warren of memories and the many lives past lies the key to a brilliant future…