Of course not. But Steven Moffat reportedly told people last night that it's official that the Doctor, that alien time traveler, can only change his shape a dozen times. With John Hurt added as a previously unknown incarnation, that makes Peter Capaldi the Last Doctor.
Top image: DrkSde on Deviant Art.
At the Ad-Lib event at this year's Edinburgh TV festival, host Frank Skinner reportedly asked, "Do you acknowledge the convention that The Doctor can only regenerate 12 times?" And Moffat answered simply, "Yes." But would not go into any detail about how he might circumvent that limitation at the end of Capaldi's run (if Moffat is even still writing Who then.)
Here are the facts: originally, the Doctor's ability to change his face was vaguely described as something that came with being a Time Lord and having a TARDIS, without any mention of limits. Then, in 1976's "The Deadly Assassin," we met an emaciated, dying version of the Master, an evil Time Lord, who had used up all 13 of his allotted bodies. Since then, the 12-regeneration limit has been mentioned on and off. In a Sarah Jane Adventures episode a few years ago, Matt Smith's Doctor hinted he could actually change his face countless times — but that appeared to be a joke.