Tenth (David Tennant) Companion: Rose Tyler Summary: The Doctor regenerates and spends most of the episode unconscious while the Sycorax threaten Earth. Rose, Mickey, and Jackie must defend the planet until he wakes up. Introduces the Tenth Doctor and the Sycorax.

The title of the 2013 Christmas Special is " The Time of the Doctor " . It originally aired on December 25, 2013, and serves as a major milestone for the series, featuring the regeneration of the Eleventh Doctor into the Twelfth . Key Features & Plot Details

: The Doctor is drawn to the planet Trenzalore , where a mysterious signal is being broadcast through a crack in the universe. He spends centuries defending the town of Christmas from his greatest enemies, including the Daleks, Cybermen, and Weeping Angels.