To quote another livejournal (spoilers for Doctor Who)
Synopsis for The Big Bang
From the BBC press release site
The Doctor is gone, the Tardis has been destroyed, and the universe is collapsing. The only hope for all reality is a little girl who still believes in stars, as this series of Doctor Who concludes with an episode written by Steven Moffat.
You know, I had been commenting that the finale might be an episode of Doctor lite, with a lot of Amy in it to compensate for the lack of her in The Lodger...but Holy Crap?
I wonder if they will have Karen and Catlin working together in a lot of scenes?