The BBC Press Release for th is years Christmas Special, A Christmas Carol, has revealed some more information about the upcoming episode and while there is little in there that is new, and the interviews are all old and have been read a hundred times over, there is some interesting plot stuff mentioned.
Its the deepest part of winter, the exact midpoint, Christmas Eve - halfway out of the dark. Amy and Rory are trapped on a stricken space liner that's plummeting through banks of thick icy fog to the surface of the planet below.
Only one man has the power to save them; only one man is in possession of a machine that can clear the fog and let them land safely.
That man is Kazran Sardick, a rich but lonely old miser who rules Sardicktown with a sky-mast of iron.
The Doctor's only chance of rescuing the ship's four thousand passengers is to save Kazran's soul and show him that life is worth living. For this he needs to go back, way back, to when Kazran was a boy with a life full of promise.
But can the Doctor put a song in Kazran's heart and love in his life, in time for Christmas? Can he bring him out of the dark?