The Mirror are reporting some pretty major spoilers on this year’s Christmas special concerning the regeneration limit.

Spoilerphobes should not read any further.

They state:

Doctor Who will face the end of a 50 year story in the Christmas special – when Time Lord Matt Smith reveals he is actually the 13th and ‘final’ Doctor.

Actor Matt, 31, has long thought to have been the Eleventh Doctor on the hit BBC sci-fi show, which can only regenerate 12 times according to the show’s folklore. Fans have worried for years that the show will have to end once the 13th Doctor dies.

But on December 25, current theories among millions of fans will be exterminated once and for all when Matt says in a dramatic speech he is the 13th Doctor and adds: “I’m dying and there is nothing I can do about it.”

On Saturday night at the end of the show’s 50th anniversary special, all the Doctors lined up, including John Hurt who was previously not thought to count. David Tennant’s Time Lord also used up an extra regeneration to save himself in an episode called Journey’s End.

A show source explained: “There have been two David Tennant Doctor Whos technically and with John Hurt playing another Doctor in the film, it basically means he can’t regenerate again.

“The riddle of the regeneration problem, something fans have talked about for decades, will be faced head on at Christmas. There is going to be another huge cliffhanger and somehow Peter Capaldi has to join and the series has to continue.

“The show’s big fans, known as Whovians, won’t believe their eyes at Christmas.”