Well, I finally caught up, thanks to On Demand. (Still have to see lots of stuff from before Rose.) Next Bonehead question: Maybe I missed something, but why is the Doctor obsessed with Clara. He seemed to be there when her parents were meeting, and again when she was a child. There was even that little short subject where he was missing "a friend" who seemingly is Clara. Of course, the little girl he's talking to on the swing turns out to be Clara as a child.
So, what did I miss?