According to The Sun newspaper today, fans will get a festive treat when the Time Lord is joined by his first-ever incarnation on the Christmas Special.

Current Doctor Peter Capaldi will share the TARDIS with Harry Potter actor David Bradley, who will reprise his role as the 1st Doctor, which was originally played by William Hartnell.

David previously took on the role in the BBC sci-fi show’s 50th drama-documentary, An Adventure in Space and Time, and will join the current 12th Doctor for the festive outing later this year.

The two Time Lords will join forces after the departure of the Doctor’s current companion, Bill Potts (Pearl Mackie) at the end of the series.

The festive plot will see the 1st Doctor help the 12th carry out his last mission in the TARDIS.

The pair must work together to move home planet Gallifrey to another dimension and save it.

Fans will also discover that the close up of Peter’s eyes from the 50th special, The Day of the Doctor, is actually the start of his regeneration.

A source told The Mirror: “David was convincing as Hartnell, it’s exciting he’s back.

“Four years ago it took all the previous Doctors to save Gallifrey, so maybe some of the others will also pop up in Capaldi’s swansong.

“It’s great that the 1st Doctor will be there to help out during those all-important regeneration moments.”

William Hartnell, who died in 1975, played the 1st Doctor from 1963 to 1966.

Peter took over as the Time Lord in 2013 but announced his departure from the role earlier this year.

The Gallifreyan Newsroom would like to stress that this news has not as yet been officially released by the BBC and as such is unofficial and should be treated accordingly.