Agh. A little late to the party here. But I thought I'd just pop in and give my take on these last few eps of Series 6. WARNING! SPOILERS BE AHEAD!
Let's Kill Hitler - Hmm... Not Moffat's best to be sure, but it does neatly tie up some of the plot threads he's weaved for the past two seasons, and gives a definite origin to the conundrum that is River Song. But the setting of WW2 Germany feels wasted, and am really not impressed with the human robot ship thingy.
But kudos to Moffat for finding a way to give the Doctor regenerations beyond the standard 12 limit, via River's improptu sacrifice for him.
Night Terrors - And this ain't Mark Gatiss' best either, but it's an improvement over
Victory of the Daleks. I feel though the idea of a alien child wanting to belong with a human family was a missed opportunity. So much potential storywise. Though I do like the doll house bits. Wonderfully creepy.
The Girl Who Waited - Now that's more like it. A heartwrenching tale of love and loss with some of the best moments between Amy and Rory. Stellar acting from both Karen Gillan and Arthur Darvill really make this one of the best stories focusing on the Doctor's companions.
The God Complex - Whoa. A terrific reworking of
Thesseus and the Minotaur as only Doctor Who can. Some great writing and character work here. Particularly with Amy, in the scene where the Doctor finally breaks her illusions of him and finally lets her grow up. Fantastic. One of DW's best IMO.
Closing Time - Nice to see the Cybermen return to being scary. Too bad though I found this episode a bit underwhelming. I liked that they brought back James Corden's Craig from
The Lodger, one of my fave eps from last season. Too bad he acts like such a stupid prat here, getting himself and his infant son in mortal peril by insisting on hanging around the Doctor. Still, nice to see the Cybermats pop up once more.
The Wedding of River Song - As season finales go, this was a bit of a letdown. I do like the idea of time collapsing because of the ensuing paradox of the Doctor not 'dying' at the appointed time. But last season's
The Big Bang had a better sense of the universal armageddon than here. As for the Doctor's handy way of cheating 'death', that felt like a bit of a copout. I would have liked for a more creative solution from him, but what's done is done. I really feel this story could have been a two parter. Everything felt a bit rushed. All in all this episode felt more like a setup for Moffat's plans for Season 7 and the show's 50th anniversary, and I do hope he delivers there.
All in all, I'd say season 6 doesn't quite match the quality of season 5. While the Moff's ongoing storyline fell flat in some places, there were some great bits. And the great thing about the Moff's tenure are the brilliant standalone eps from other writers. The aforementioned
The Girl Who Waited (Tom Macrae),
The God Complex (Toby Whithouse), and of course,
The Doctor's Wife (by some guy named Gaiman

).
On the acting front, Matt, Karen and Arthur were all consistently good, and the arcs of their respective characters were resolved in a satisfying way.
So yeah, I'm looking forward to season 7 and the 50th year of Doctor Who. Let's hope it delivers.