A life-changing encounter. A fugitive from the stars. Wrathful warriors in pursuit. Landing on Earth, the Doctor finds a stranded alien in need of protection – and is dragged headlong into the life of his old friend Donna Noble, knowing that if she ever remembers their time together, she will die... Based on a script by Russell T Davies, this brand-new adventure for Doctor Who’s 60th Anniversary features David Tennant as the Fourteenth Doctor and Catherine Tate as Donna Noble.