"We all change.... when you think about it. We're all different people all through our lives. And that's OK, that's good... you gotta keep moving so long as you remember all the people that you used to be. I will not forget one line of this.... not one day, I swear..." I am not sure if this has been discussed before here (I suspect that it might have been & I simply missed it), but Eleven made quite a nice observation about growing & changing through life- not only for a Time Lord, but for us humans, too. Does anyone think this is setting us up for Capaldi's Doctor actually forgetting and going for a while NOT remembering who he is, to be played out over a few episodes? Not the usual post-regeneration disorientation for part of an episode, but a real identity crisis and re-discovery that figures into the plot of more than one episode? I think it might, but I hope it only does last for a short bit of the next series.