Merlin

Season 5, Episode 1

Episode Title: Arthur's Bane (1)

Air Date: 2012-10-06

Overview:

Camelot faces a new golden age, but even as the city flowers, the dark seeds of destruction are being sown. In the frozen wastelands of the north, men are disappearing without a trace. King Arthur and his knights undertake a dangerous mission into the unknown in search of answers - but once there, Merlin finds himself locked in a battle unlike any he has fought before.