About Doctor Who Season 10, Episode 10 : The Eaters of Light

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… Guest Stars: Michelle Gomez, Rebecca Benson, Daniel Kerr, Brian Vernel, Rohan Nedd, Ben Hunter, Samuel Adewunmi, Billy Matthews, Aaron Phagura, Jocelyn Brassington, Lewis McGowan,