Just seen this over on Gallifrey Base. At an interview with the Moff at the New York screening yesterday , he had this to say
A very important aspect of the Doctor’s own past will finally be dealt with this season as Newsarama learned exclusively – The Doctor’s regeneration limit. "It’s been addressed in a very, very cheeky way by an old friend of mine and I’m not going to tell you any more about that," said Moffat, telling us to "wait and see."
Full interview link here
http://www.newsarama.com/tv/Doctor-W...er-100415.html

Suggestion on GB that the old friend Moff is referring to is Simon Nye. Who wrote the upcoming episode where The Doctor is seperated from the Tardis for a while and has to lead an everyday life-complete with James Corden as a mate!
A very important aspect of the Doctor’s own past will finally be dealt with this season as Newsarama learned exclusively – The Doctor’s regeneration limit. "It’s been addressed in a very, very cheeky way by an old friend of mine and I’m not going to tell you any more about that," said Moffat, telling us to "wait and see."
Full interview link here
http://www.newsarama.com/tv/Doctor-W...er-100415.html

Suggestion on GB that the old friend Moff is referring to is Simon Nye. Who wrote the upcoming episode where The Doctor is seperated from the Tardis for a while and has to lead an everyday life-complete with James Corden as a mate!




) 
) story about that, shall I link to it?