Okay, there was a lot in this one and I think I will need to watch it again to give any proper overview. I think that it was, without a doubt, one of the most intricate and clever Doctor Who stories and almost certainly the cleverest one to be shown on television. At times it was also stupendously cool. The whole sequence of River Song escaping and being rescued was the single best sequence/set piece I have seen since the "Putting out fires with Gasolene" sequence in Inglorious Basterds. Matt Smith is, once again, effortlessly brilliant and mulit-faceted as the Doctor. Karen Gillan gets to be more interesting as Amy. River Song remains firmly wedged on the line between intriguing and irritating, but by and large I remain intrigued.
All in all this was, at least, a solid 9 on 10. But I do have to take issue with the "OMG BEST EPISODE EVAR!" type reviews we are getting. Here's a list of episodes that are better:
2) Bad Wolf/Parting of Ways.
3) The Girl in the Fireplace.
4) The Impossible Planet/The Satan Pit.
5) Army of Ghosts/Doomsday.
6) Human Nature/Family of Blood.
8) Utopia-Last of the Timelords.
9) Turn Left.
Not to mention a bunch of stories from the original run, novels, audios and comics.
But I'll certainly take "one of the greatest ever" any day of the week!