Bill and the Doctor head back to the 2nd century to solve the mystery of the Roman 9th Legion and end up discovering something much more sinister at work.
Doctor Who episode “The Eaters of Light” was filmed in Cardiff in the United Kingdom.
In the present day, a young girl listens to the music inside the hill. Back in the 2nd century, Nardole and the Doctor find the same cairn containing a strange portal defended by a group of Picts.
Source: dw-location-hunter — Tumblr
Bill is searching the woods for signs of the Ninth Legion when she encounters a young Pict who chases her into a pit trap.
Source: dw-location-hunter — Tumblr
Bill runs from the monster and climbs down into the hidden cave.
Source: dw-location-hunter — Tumblr
Bill hides underground with the remainder of the Ninth Legion.
Source: The Angel Hotel — Twitter