The official BBC Doctor Who
website has posted a clip
from the forthcoming Christmas special, "The Next Doctor", as the treat behind the door of day 21 on their "Adventure Calendar". The calendar counts down to Christmas with a variety of special material made available each day in December.
The new 50-second video clip, only available to UK users of the site, features the character of Miss Hartigan (Dervla Kirwan) interacting with the Cybermen.