GERONIMO! Matt Smith will be leaving the role of The Doctor with this year's Doctor Who Christmas Special, though head writer Steven Moffat and Jenna-Louise Coleman's Clara will apparently be staying on. Are we equipped to speculate on who'll be replacing him? How about one of the kids from Harry Potter? There'd been speculation for years of a female Doctor incarnation, and Emma Watson could be an interesting choice to lend star power to get over the hump of making that sort of radical change.