Once upon a time there was belief that The Doctor could only regenerate twelve times thanks to a 1976 Doctor Who episode, "The Deadly Assassin" but that notion has quietly been discarded by the BBC. Nevertheless, number twelve will be an important step for the next run of Doctor Who episodes as the series reached some incredible high points with Matt Smith and attracted some big names to direct and write episodes. However, Smith had decided to depart the long-spanning franchise at the end of this year much to the dismay of fans around the world. Now, debate is running rampant about who should fill his shoes. Take the poll below and voice your opinion about who should be his replacement? Should the series stay young or should The Doctor be old again? Or perhaps a woman?