Seen it twice now. That was utterly, utterly wonderful, just amazing. Damn when Moffat's good Moffat's amazing
It might have worked better at the end of the full series rather than half a series, certainly Clara would have come across better that way, and her potential sacrifice would have had more meaning. JLC was great in this though, hell everyone was. Matt Smith was stupendous, and his goodbye to River sent chills down my spine.
Might well be the best season finale since the show came back...
Oh and thank god the Paternoster gang all survived!