The BBC has released the trailer for their Doctor Who Christmas special, which is titled "The Snowmen." The trailer starts out with a nice little introduction by Matt Smith and Jenna Louise Coleman.
The episode is set to air on Christmas Day and will feature the first appearance of the Doctor's new companion, Clara. He will also will cross paths with the homo-reptilian Silurian Madame Vastra (Neve McIntosh) and her associate Jenny (Catrin Stewart).
The episode was written by lead writer and executive producer Steven Moffat (Sherlock), and it looks like it's going to be great! I can't wait to see it!