The Darkest Hour

 Revival of the Witch is the two-part story consisting of the first two episodes of the fourth series of Merlin. The title indicates that Morgause or even Nimueh will be revived. This episode will presumably follow the reprecussions of the previous series finale. Colin Morgan has said it focuses on darkness and that Morgana will release monsters that only come out in the dark from the underworld. It is possible that nobody will be revived as Revive basically means Return and Morgana is often called the Witch by some people so the title translates to "Return of Morgana"

Part One
Morgana will take the wounded Morgause to the Isle of the Blessed, Merlin is to face his toughest challenge yet when Morgana's blind determination puts at risk Arthur's future as well as the very balance of the world. Morgana uses powerful magic to tear "the mystical veil between our world and the next." The Cailleach a "terrifying gatekeeper to the spirit world and her people The Dorocha (or shadow people) creatures are released and wander around, killing everyone who succumbs to their touch. With Uther but a mere shadow of his former self, it comes down to Arthur and his loyal knights to safeguard the kingdom. However, swords won't be enough to vanquish the newest threat and Merlin is utterly shocked to find out what it'll take to restore the equilibrium of the world: a sacrifice of unimaginable proportions is required.

Part Two
Morgana has accidentally revived Nimueh who plans to use the Gatekeeper to her own advantage,to rule over Camelot and she will destroy Merlin and Morgana and anyone who is either attacking Camelot or protecting it.She will make no allies, not even Morgana or Morgause.

Part One
TBA

Part Two
TBA

Cast

 * Colin Morgan as Merlin/Emrys
 * Bradley James as Arthur Pendragon
 * Katie McGrath as Morgana Pendragon
 * Emilia Fox as Morgause
 * Gemma Jones as The Cailleach
 * Angel Coulby as Guinevere
 * Anthony Head as Uther Pendragon
 * Richard Wilson as Gaius
 * John Hurt as the voice of Kilgharrah
 * Rupert Young as Sir Leon
 * Santiago Cabrera as Sir Lancelot
 * Tom Hopper as Sir Percival
 * Adetomiwa Edun as Sir Elyan
 * Eoin Macken as Sir Gwaine

Broadcast
2011.

Trivia

 * This is the show's fourth two-parter, after The Coming of Arthur, The Tears of Uther Pendragon and Beauty and the Beast, and the second time a series has started with one after The Tears of Uther Pendragon.