From the first actor, William Hartnell, to returning star David Tennant and the first female Doctor, Jodie Whittaker, viewers have been treated to 15 Time Lords over the years.

This month, BBC's long-running sci-fi and fantasy show Doctor Who will be celebrating its 61 year as the programme first aired back on 23 November 1963.

Originally airing as part of the War Games story arc in 1969, the episode marked the transition between Patrick Troughton and Jon Pertwee.

The BBC has announced it is releasing colourised Doctor Who footage ahead of a forthcoming special that will see a classic 1969 storyline revamped for modern screens. The BBC has announced that the Time Lord’s regeneration into the third Doctor will be aired in a new colourised version of an episode originally broadcast as part of the War Games storyline in 1969.