After all the presents are unwrapped on Christmas Day, Doctor Who fans will get one last gift, the final appearance of Matt Smith as the Time Lord in the annual Christmas special entitled "The Time of the Doctor". BBC has unveiled the second trailer for this holiday event, where the Doctor and Clara (Jenna-Louise Coleman) must decode a mysterious signal before it's too late. Take a look at the latest footage, and you can CLICK HERE to check out the photos that debuted last week.

Orbiting a quiet backwater planet, the massed forces of the universe's deadliest species gather, drawn to a mysterious message that echoes out to the stars - and amongst them, the Doctor. Rescuing Clara from a family Christmas dinner, the Time Lord and his best friend must learn what this enigmatic signal means for his own fate and that of the universe