OMFG, the whole episode I had nothing to say and now suddenly and finally we're back to the point of the Doctor having the face of someone he's encountered before!
... Hm, a bit disappointing what they did with it in the end. And it makes me worry about what they'll do when the Doctor finally finds Gallifrey.

I like the change from true two-parter to a finished story and its sequel. Yet I'm somewhat disappointed that we won't get a surprise comeback by Ashildr sometime later this season, but that we know we'll see her again right in the next episode.