Meet the Vashta Nerada
The Doctor and Donna enter a world of terror inside an abandoned library as they come face-to-face with the piranhas of the air - the Vashta Nerada. Fantastic clip from the fourth series of the BBC programme Doctor Who starring David Tennant, Catherine Tate and Alex Kingston
Race to Save River Song
The Doctor has made peace with the Vashta Nerada long enough to free everyone trapped in the library. But before he can leave he takes a closer looker at River Song's sonic screwdriver. Is there a chance that she can be saved?
River's sacrifice
River Song prepares to make the ultimate sacrifice as she wires herself into the data core. With the Doctor handcuffed and helplessly looking on, will Donna and the others lost in the library be saved?
Everybody lives?
'Everybody knows that everybody dies' but perhaps not today as the Doctor rushes back for a closer looker at River Song's sonic screwdriver. Is there a chance that she can be 'saved'?
River, You Know My Name
River chooses to sacrifice herself to save everyone in the Library - but the Doctor isn't ready to lose the most mysterious person in his life.