Final three episodes of the BBC's relaunched version of the television sci-fi classic, following the adventures of the Doctor (Christopher Eccleston) and his human assistant Rose (Billie Piper). In 'Boom Town' the Doctor and Rose, along with new companion Jack Harkness (John Barrowman), stop off to recharge the TARDIS in present-day Cardiff. While Rose meets up with her boyfriend Mickey (Noel Clarke), the Doctor discovers that a member of the evil Slitheen race (Annette Badland) has survived, and has installed herself as the new mayor. Foiling her plan to detonate a nuclear power station in Cardiff city centre, the Doctor prepares to take her back to her home planet for trial, unaware that the Slitheen has one more trick up her sleeve. In 'Bad Wolf (Part 1)' the team are separated and find themselves in sinister futuristic versions of popular game shows and reality TV programmes, where failure is punished by death. After escaping a murderous version of Big Brother, the Doctor realises that he is back on Satellite 5, a hundred years after he left it. But what is the Bad Wolf corporation, and where has the Doctor heard those words before? Finally, in 'The Parting of the Ways (Part 2)', Rose has been captured by the evil Daleks, and the Emperor Dalek reveals its plan to invade the Earth. After launching a daring rescue mission, the Doctor begins work on a device that will wipe out the Daleks, but could also wipe out all life on the planet. While Jack prepares to defend the base, the Doctor sends Rose back to her own time against her will. As the Daleks invade Earth 200,000 years in the future and the Doctor runs out of time, Rose manages to break open the heart of the TARDIS and return to the future, where she undergoes a shocking transformation and saves the world. At the brink of death, the Doctor reveals the Time Lords' most mysterious gift - the ability to regenerate - and takes on a whole new look (played by David Tennant).