Saturday, 7th June 2008 7:00PM BBC One (45 mins)
As the shadows rise and march, the Doctor forges an alliance with the mysterious River Song, as Russell T Davies’s Bafta Award-winning time-travelling drama continues. 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.