The latest - short - instalment of the BBC's scifi drama will air as part of charity fundraiser Children in Need this week, with Scotland's David Tennant continuing to play the 14th Doctor after taking over from Jodie Whittaker after a suprise twist.
He's returning to the role he played to great acclaim from 2005–2010, as the 10th Doctor, but will soon make way for his fellow countryman Ncuti Gatwa.
The Sex Education star's first episode proper is expected to be screened over the festive season, when he will become the latest Scot to play a part in the journeys of the Tardis through space and time.
Here are some of the most important, since the first epidode was broadcast in 1963.
13. Tony Curran
Glaswegian Tony Curran has a string of sci-fi and comic book blockbusters under his belt, including Underworld: Evolution, Thor: The Dark World and Daredevil. He also appeared in Scottish historical drama Outlaw King and BBC drama Mayflies. He played Vincent van Gogh alongside Matt Smith's Doctor in 'The Doctor and Vincent', an episode penned by Richard Curtis. He then had a cameo in later episode 'The Pandorica Opens'. | Getty Images