I enjoyed the ep, certainly, and love seeing Amy and Rory again. I don't care for River Song--it's just that arrogant "I know better than any of you, even you, sweetie" I can do without--but yes, that scene was well-done.

I do really like both of the Sheppards, I agree, though I can't help wishing they'd gotten Americans to play those roles. :)

The Silence are definitely creepy.

And yes, I think that's going to the big mystery/reveal of the season. But I can't help thinking of the Watcher in Logopolis.