Titled 'Clara's First Christmas', the three-minute clip takes a closer look at filming in Bristol.
"Generally, if you're in Cardiff trying to shoot Victorian London, you end up in Bristol, because it's got some nice Victorian, Georgian and older streets," said the episode's director Saul Metzstein.
Metzstein also described Jenna-Louise Coleman, who plays new companion Clara Oswin Oswald, as "the heart of the story of Christmas".
Executive producer Caroline Skinner explained how the crew managed to film the Tardis sitting in the clouds, hailing the completed result as "a triumph of visual effects and special effects".
She also joked that they wanted to avoid making the scene feel "like Top of the Pops in the '70s".
Coleman is also seen commenting on the size of the crowds and how the fans went "absolutely crazy" when Matt Smith arrived on location for filming.
Doctor Who will return with new episodes in 2013 - the show's 50th anniversary year.
Watch Steven Moffat talking to Digital Spy about the Doctor Who Christmas special below:
Photo gallery - 'Doctor Who' Christmas special 'The Snowmen':
Copyright: BBC Adrian Rogers