The Darkest Hour (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.
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Every episode is already streaming. About 2 months covers the whole binge.
Subscribe ~2 months · binge 52 of 65 episodes, then cancel
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Airs
Sat, Oct 1, 2011
43 min
Show
Merlin
65 episodes
Episode
S4 · E1
in Merlin
Up next
S4 · E2
The Darkest Hour (2)
Sat, Oct 8, 2011