PETER CAPALDI is bowing out of Doctor Who in this year's Christmas special and one actor has admitted that they are nervous about taking on the famous Time Lord role.
However, there will be a total of three Doctors in the festive episode.
David Bradley is adopting the part of the First Doctor, originally played by William Hartnell, and is anxious about the responsibility the role brings.
“I never thought for a moment that I’d be asked to do an episode as the Doctor, let alone the big Christmas one,” the 75-year-old actor confessed in an interview with TV Times.
David first starred as actor William Hartnell in the BBC drama An Adventure in Space and Time back in 2013.
“Before I felt a responsibility to get it right for William and his family, but now I feel like I need to get it right for the fans,” he continued.
This year’s Christmas special, Twice Upon A Time, will see the First Doctor come face to face with the 13th incarnation.
The two meet in the South Pole and are joined by former Tardis companion Bill Potts (Pearl Mackie) and the Captain (Mark Gatiss), a WWI soldier.
When a glass lady appears with a warning from the past, the group embark on an exciting adventure.
David revealed emotions were high as Peter filmed his final scenes.
“At one point Peter and I looked at each other and I wondered who was going to well up first!” he divulged.
“Peter has been a wonderful Doctor and it was an honour to be a part of his final appearance.”
The eleventh season is expected to return with Jodie, 35, as the thirteenth Doctor in Autumn 2018.