Who's next?

Peter Capaldi has announced that he is leaving the role of The Doctor at the end of this year's Doctor Who Xmas special. How will Capaldi's reign as The Doctor be remembered? Only time will tell. Steven Moffat will also be leaving his post at the same time, thereby continuing an unwritten tradition of new showrunners bringing with them new Doctors. Chris Chibnall takes over the running of Doctor Who and will be the one responsible for selecting  the new Doctor. The bookmakers have started taking bets.