Merlin: Season 4, Episode 12

4 - 12: The Sword in the Stone: Part One

With Morgana at the head of a vast Southron army, a deadly net is closing in around Camelot. When the sorceress strikes, the ferocity of her attack forces everyone to run for their lives - even Arthur. However, Morgana won't be satisfied with letting him escape that easily and a chilling hunt will follow. And so begins a chilling hunt. Can Merlin save the King from Morgana's clutches? Or has Arthur's luck finally run out?