Season 1

Jackie Tyler is at home preparing for the festive season, when she hears the familiar sound of the TARDIS. Mickey, who is hard at work, also hears it. They both race across the estate, just in time to witness its glorious, chaotic crash landing. The doors open and, much to their delight, out steps Rose - and a complete stranger.

Except it isn't a stranger; it is The Doctor, and the process of his regeneration is not yet quite complete.

Prime Minister Harriet Jones has just been informed that a British space probe, on its way to Mars for a Christmas Day landing, has gone missing. It's been kidnapped by a monstrous race known as the Sycorax, who are set on taking over the world.

Meanwhile, Rose desperately tries to wake The Doctor.