David Tennant stepped in as the Tenth Doctor and was introduced to viewers in the series' first Christmas special, "The Christmas Invasion." This year marks the 20th Doctor Who Christmas special.

How to watch: Doctor Who: "The Christmas Invasion" is now streaming on Max. This Tenth Doctor special is the beginning of his end as the titular Time Lord. (Well, sort of.) As you might expect ...

The Time Lord has been a fixture of the BBC's festive schedules ever since 2005's "The Christmas Invasion", and this year is no different. The last time we saw Ncuti Gatwa's Doctor, he'd just ...

“The Christmas Invasion.” The episode was an auspicious start to the show’s new Golden Age, led by the showrunner and writer Russell T. Davies, with David Tennant as the Doctor. The 10th ...

Holiday episodes have been a feature of the series since 2014, when “The Christmas Invasion” gave Tenth Doctor David Tennant his first full episode, just as “The Church on Ruby Road” did ...