If you thought the 50th anniversary special of Doctor Who was full of twists and turns, you're in for a lot more with the Christmas episode, according to reports.
In the midst of images, a trailer and a title being released for the festive offering of the hit BBC sci-fi show, it has now been alleged that fans will see Matt Smith's Doctor admitting that he is the 13th regeneration of the Time Lord - going against the claims that the Time Lord only has the ability to regenerate 12 times.
But with Peter Capaldi taking over from Matt Smith, what is going to happen?
Matt Smith will be playing Doctor Who for the last time in the Christmas episode (BBC Pictures)
Alleging that the Christmas episode will "solve" the problem, a source told the Mirror: "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 insider added: "The show's big fans, known as Whovians, won't believe their eyes at Christmas."
Check out the trailer for the Christmas episode.
Meanwhile, the 50th anniversary special episode of Doctor Who wasn't just a hit in the UK it seems, as The Day Of The Doctor gave BBC America, their "biggest ever audience" when the special offering of the hit sci-fi drama was finally aired over the weekend.
Did you tune in to see The Day Of The Doctor on Saturday? (BBC Pictures)
With the show starting at 7.50PM GMT in the UK, the 75 minute offering then began playing in different countries in order to avoid any spoilers that may have made their way onto the internet.
As a result, The Guardian has reported on the news that BBC America scored its "biggest ever audience" with an average of 2.4 million viewers, which was later bumped up with 1.2 million people tuning in to see the show when it was repeated on prime time.
In the UK, 10.2 million people tuned in to see the show on BBC One which saw David Tennant return as the Doctor alongside iconic actor John Hurt who played the role of the Lost Doctor.