Rose and the newly-regenerated Doctor continue their adventures together in this Christmas Special episode. Christmas becomes a time of terror for Planet Earth, as the whole of mankind falls under the shadow of the alien Sycorax. Rose needs the Doctor's help, but can she trust a man with a new face?

At the end of Last of the Time Lords, a ship crashes through the side of the TARDIS, mid flight, and a life ring bearing the name 'Titanic' is thrown towards the Doctor - what on Earth is going on?

Whilst attending a carnival on the Chino-planet of Shan Shen, Donna is cajoled into having her fortune read, where her past is carefully examined. With the Doctor missing, Donna must work with Rose, a traveller from a parallel universe, to prevent darkness encompassing the whole of the universe.

The Earth has been moved, and it's a race against time as Donna and the Doctor try to find it before the Daleks destroy everything; they head for the Shadow Proclamation and the Medusa Cascade. Meanwhile on Earth a veritable bevy of ex-companions join together to contact the Doctor and take down the Daleks. Can Captain Jack, Sarah-Jane, Martha Jones and Rose find the Doctor in time...