Quote Originally Posted by Autocon View Post
Hmm i was disappionted with the episode. It was nice when they involved the christmas truce during the war. So this means he knows from the very start of his life when he will be in conflict to regenerate, and he will survive everything up to that date.
My understanding (and this might be fan theories) is that when different versions of the Doctor meet each other a temporal paradox prevents the younger Doctor from keeping the memories of the encounter (and the older Doctor only regains the memories as events happens in his/her timeline).

Edit: thinking more about Doctors meeting each other, with the teaser for this ep months ago I thought it might touch on a) The first Doctor starting the calculations to freeze Gallifrey in a single moment of time and b) the twelfth Doctor heading to Gallifrey to help save it at the end of the Time War.

But I'm not disappointed it didn't. Those are just two events we know happened because we saw them. We don't actually need them shown to us (like we didn't see when 9 of the other Doctors made the trip to do it)

I have been wondering today since the cliffhanger if the next series might take a page out of the third Doctor's book and ground her on Earth with no TARDIS but that might annoy the people who already annoyed by what they think the new series will be like.