4.17 Nightmares Reign

According to a post on the Gallfrey Base forum, the title for the first Doctor Who 2009 Christmas special is Nightmares Reign. We have already seen from the Comic-Con trailer that one of the final two specials is called The End of Time. This would be an appropriate title for the episode since the trailer says"It is said that in the final days of planet Earth, everyone had bad dreams".