The BBC have released the official story synopsis for In the Forest of the Night, the tenth episode of Series 8, written by Frank Cottrell Boyce.

One morning, in every city and town in the world, the human race wakes up to face the most surprising invasion yet. Everywhere, in every land, a forest has grown overnight and taken back the Earth. It doesn’t take the Doctor long to discover that the final days of humanity have arrived…

It premieres Saturday 25 October at 8.30pm on BBC1.