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.