Killer Santas, exploding baubles, an alien spaceship shaped like a giant star - Christmas with the Doctor is anything but a silent night...
It is Christmas Eve, and as Donna Noble prepares to walk up the aisle to marry her boyfriend Lance, she suddenly finds herself vanishing in a glow of golden energy and materialising alongside the Doctor in the TARDIS. The Doctor is as astonished as she is at her sudden appearance - and a little taken aback by this loud-mouthed bride-to-be who doesn't mind giving a 'martian' a slap round the face.
As the TARDIS races to get to the Church on time, the Doctor begins to pick up clues to who is after the feisty fiancée. The return of the robotic Santas, the strange energy particles surrounding Donna and the discovery of a secret ex-Torchwood base under the Thames, point to just one thing: the return of the Racnoss, an ancient spider-like race who were wiped out over 4.6 billion years ago.
By the time the Doctor discovers that Donna is the key to Racnoss's plan to destroy the Earth, time is running out. Can he solve the puzzle, defeat the giant arachnid Empress, stop her army of santas - and get Donna home in time for her Christmas dinner?