Isn't Freema Agyeman fantastic?

I've just seen seen Smith and Jones, the first episode of the new season of Doctor Who. And already I think Freema Agyeman is fantastically cast as Martha Jones.

Otherwise the episode was a reasonable opener, though I suspect that once again the best of the season is yet to come. And is it me or did anyone else think the monsters were a resign of the Sontarans when they first saw them?