"The motorway bends around the woods. So did the old road. So did the Roman road. As long as people have lived here, they've gone out of their way to avoid the woods..."

England, today. Between the housing estate and the motorway lies an ancient wood. The motorway bends to avoid it. Last week, teenager Laura Brown went missing. Tonight, Vicky Caine will miss her bus and take a shortcut through the wood. And she will disappear too. England, 1917. Between the village and the main road lies an ancient wood. The old Roman road bends to avoid it. Tonight Emily Bostock and a man called Rory Williams will go to the woods.

Investigating events in the present day and back in 1917, the Doctor and Amy are desperate to find out what's happened to Rory. He was supposed to look after Emily – and now they've both vanished. Something is waiting in the woods. Something that's been there for thousands of years. Something that is now waking up...