The following article contains details about The Eaters of Light that some readers may wish to avoid.
The BBC has released the official synopsis for The Eaters of Light, the tenth episode of the currently-airing tenth series of Doctor Who.
The Eaters of Light is written by Rona Munro and directed by Charles Palmer.
A long time ago, the ninth legion of the Roman army vanished into the mists of Scotland. Bill has a theory about what happened, and the Doctor has a time machine. But when they arrive in ancient Aberdeenshire, what they find is a far greater threat than any army. In a cairn, on a hillside, is a doorway leading to the end of the world…
The Eaters of Light airs on Saturday 17th June on BBC One, broadcast time to be confirmed.