Mark Dexter

Crusoe and Friday have to defend themselves against a ship full of men; Blackthorn and some of his men try to find some of Crusoe's precious personal belongings.

One hundred years ago, the Universe's greatest library was sealed off with only a cryptic warning as explanation: 'Count the shadows.' However, it now appears that the shadows are on the move again. The Doctor and Donna must uncover the terrible truth behind the Nodes and the horrifying Data Ghost to uncover the Library's secret.

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