Fifteen years ago, The Doctor had to wipe Donna Noble's mind or else the knowledge of a Time Lord would burn her up. While he put in a failsafe to make sure that she would never remember him, fate has returned the face of the 10th Doctor and reunited him with Donna and her family. Can he save...

It was only a year into the Doctor Who revival of 2005 that David Tennant took over as the titular Time Lord. Would the show survive changing its lead so soon when it had barely found its feet? Four years later, we scarcely had to wonder, as arguably the most popular incarnation of the new era...