Mark Dexter

One hundred years ago, the Universe’s greatest library was sealed off with only a cryptic warning as explanation: "Count the shadows." It now appears that the shadows are on the move again. The Doctor and Donna work to uncover the Library’s secret.

As the shadows rise, the Doctor forges an alliance with the mysterious River Song. But can anyone stop the Vashta Nerada? While the Doctor discovers secrets and revelations about his own future, the sinister Nodes declare that Donna is doomed.

Finding a way home After discovering that Blackthorn is no friend, Crusoe (Philip Winchester) and Friday (Tongayi Chirisa) must defend themselves against a ship full of men. Blackthorn (Sam Neill) and some of his men set out on foot to find some of Crusoe’s precious personal belongings in the tree house. Samuel Tuffley (guest star Mark Dexter) gets into a tough spot when Crusoe corners him for information. Crusoe gets to the bottom of Blackthorn’s motives. Sean Bean, Anna Walton and Mia Maestro also star.