The Doctor brings Rose home a year after she left. to find London in chaos. A spaceship has crashed into the Thames and an alien body lies in the wreckage. The Doctor uncovers a chilling conspiracy at the heart of Downing Street as ruthless alien invaders take control - members of the Family Slitheen. The Doctor, Rose, and the MP for Flydale North must fight to expose the Slitheen infiltration - before the Earth falls prey to a deadly interstellar con that will ignite World War Three. Starring Christopher Eccleston as the Ninth Doctor and Billie Piper as Rose, Russell T Davies's blockbuster action-adventure was the first two-part story of the modern series in 2005. It is novelised by playwright and screenwriter Joseph Lidster.