This is going to be interesting, especially with how it all ties together. I note the TARDIS console room from The Lodger showed up again. Is it a repurposed set, or are the Silence somehow connected to Gallifrey and the Time Lords?
I figure I might want to chime in some more, that I adore the current TARDIS dynamic between River, Amy, Rory, and the Doctor. It doesn't feel "crowded" like it did during Davidson's era and each character has their own role to play.
I especially like how the companions are actually doing something, rather then just standing around and looking in awe of the Doctor. I also like how Moffat lampooned that particular trait with Matt's line in the TARDIS.
Matt's performance continues to impress, how he can be giddy and carefree like a school boy one minute and then suddenly be a 900+ year old being in another. He might be the youngest person to play the Doctor, but he's the first (With the possible exception of Slyvester McCoy) to actually make the audience believe he's as old as he says he is.
And I have to admit, Matt's Doctor can be really cruel. His remarks to River in the TARDIS were extraordinarily harsh, especially given his warmth to her in the beginning of the episode. At the same time, it makes sense because the Doctor still doesn't know who she is yet.
Rory's a joy of a companion and it's nice to see him get credit in the opening sequence. That being said, there seems to be rumblings of a relationship strain with Amy and I hope there isn't. The Doctor has River for romantic interludes, enough with the doe eyed Companions already!
Nixon's makeup seems like it was halfway done for comedic effect. Disappointed there, especially given Churchill's appearance last season but eh. Still the best line of the show thus far (And very Tom Baker-ish too):
"Please, I waltz into the most highly guarded facility in the world, park a big blue box on the rug and you think you can shoot me?"
"Take away a mans light, his clothes, his food, his friends, his air, and you leave him with nothing but himself. And for most that is not pleasant company."
~ Ramse Truman, "Decending"