Merlin 4x1
The Darkest Hour - Part 1
Evil sorceress Morgana summons mighty gatekeeper the Cailleach, who opens a door to another world from which hellish creatures pour forth. As Arthur and his loyal knights take up arms, Merlin discovers the only thing that will stop them is an unimaginable sacrifice.
Merlin season 4
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4x1The Darkest Hour - Part 1 Oct 01, 2011 -
4x2The Darkest Hour - Part 2 Oct 08, 2011 -
4x3The Wicked Day Oct 15, 2011 -
4x4Aithusa Oct 22, 2011 -
4x5His Father's Son Oct 29, 2011 -
4x6A Servant of Two Masters Nov 05, 2011 -
4x7The Secret Sharer Nov 12, 2011 -
4x8Lamia Nov 19, 2011 -
4x9Lancelot du Lac Nov 26, 2011 -
4x10A Herald of the New Age Dec 03, 2011 -
4x11The Hunter's Heart Dec 10, 2011 -
4x12The Sword in the Stone: Part One Dec 17, 2011 -
4x13The Sword in the Stone: Part Two Dec 24, 2011