Take a look @ new footage, plus images from the "Doctor Who" episode "The Eaters Of Light", written by Rona Munro and directed by Charles Palmer, airing June 17, 2017 on BBC America:
"...a long time ago, the ninth legion of the 'Roman' army vanished into the mists of Scotland. 'Bill' (Pearl Mackie) has a theory about what happened, and the 'Doctor' (Peter Capaldi) 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..."
Click the images to enlarge and Sneak Peek "Doctor Who: The Eaters Of Light"...