River Song is dragged into the madness of the Time War, alongside a Doctor who never wanted to fight that battle. River thinks she knows where their paths will take them, but the temporal battlegrounds are shifting - and she can no longer take anything for granted. Not even her own existence.

4.1 The Shape of Fear - The Stormcage is attacked by creatures recruiting for the Time War, and the Doctor saves its most dangerous prisoner. He takes River into hiding on a remote world, whose rulers reject science. But spectres stalk the unwary, as the land itself becomes the enemy. And when the Doctor is lost, River discovers that the worst thing to do is to become emotional.

4.2 Bad Timing - River knows this Doctor's time is almost over. She can’t save him, but he wants to save her. Trying to escape the Time War, they end up deeper inside it, on a Time Lord mission threatening the fabric of causality. But the Daleks are to blame for the Doctor’s fate - and River will make them pay.

4.3 Unchained Melodies - River Song takes a moment to find herself, to discover her true potential... and put a stop to it before it even gets started! Is she the Woman Who Killed the Doctor? Or the Woman Who Wins the War? In the maelstrom that is the Time War, she can be both and neither all at once.

The Reality Director - We go behind the scenes of the making of the latest River Song adventure with cast and crew.