Episodes 1-3 from the fourth series of the BBC's relaunched version of the sci-fi classic, starring David Tennant as the legendary Time Lord. Comedienne Catherine Tate, who last made her entrance as Donna Noble in the 2006 Christmas special, returns as the Doctor's new assistant. Episodes comprise: 'Partners in Crime', 'The Fires of Pompeii' and 'Planet of the Ood'.