Guys, a theory about Tasha Lem: Didn't Tasha and the Doctor's relationship seem familiar? Also, what's Lem spelled backwards...And, as we've seen, new regenerations can be granted to those who've run out. Also, River was stored in a Library computer...Tasha leads the Church of the Papal Mainframe. Lastly:
Tasha - We Engineered a Psychopath to kill you...
Doctor - Totally married her...I'd never have made it here alive without River Song.
(several minutes later)
Doctor - You have been fighting the psychopath inside you all your life.
I'd have mixed emotions about that, firstly River's back yay. But second they're undoing the impact of a classic episode, a shitty habbit Moffat's developed lately. River should stay gone because her arc is great but a big part of that was knowing from the beginning how it would end. And thirdly Im fairly attached to that specific actress as River. And in fairness, these 2 have had hundreds of years to develop a rapport. I think you're reading into it. I hope you're reading into it. As I've said before if Moffat's just going to break every rule he establishes then nothing that happens matters because it can all be redone or undone.