Timeboy, who has proved a reliable source of information for upcoming episodes of Doctor Who has revealed some spoilers and story details for this year’s Doctor Who Christmas Special!
The Christmas special is following Moffat’s tradition of adapting Christmassy stories, and this time it’s The Snowman. As with the previous two Christmas specials, it won’t be a truly faithful adaptation, and obviously has a science-fiction twist to it.
The Snowman (or possibly Snowmen) isn’t/aren’t actually made out of regular snow. They’re made out of alien snow. Living snow with its own consciousness. And the snow is very, very hungry. Packed together into a humanoid figure, it’s deadly. Also, Vastra is narrating the episode.
Thanks to The Doctor Who TV and Timeboy.