9. Bad Blood

With the Family of Blood breathing down the neck of the Doctor's alter ego, time is running out for John Smith. There's a glimpse of a life more ordinary (for the Doctor) as well as a vision of the dark future ahead. The complexities of filming the episode are revealed, as well as the logistics behind the explosive ending. Features interviews with head writer Russell T Davies and Freema Aygeman on one of her toughest assignments yet.