“The Darkest Hour – part 1”
General information
| First Aired: | 1 October 2011 |
| Viewers: | 6.40 million |
| Written by: | Julian Jones |
| Directed by: | Alice Troughton |
| Guest Stars: | Rupert Young (Recurring), Eoin Macken (Recurring), Adetomiwa Edun (Recurring), Santiago Cabrera (Recurring), Tom Hopper (Recurring), Emilia Fox (Recurring), Nathaniel Parker (Recurring), James Greene, Gemma Jones, Katie Moore, Zee Asha and Greg Bennett (uncredited) |
| Filming locations: | The Blue Pool, Cannop Ponds, Clearwell Caves |
Summary
Merlin faces his toughest challenge yet when Morgana’s blinkered determination threatens not only Arthur’s future, but the very balance of the world. With her magic stronger than ever, the sorceress summons the mighty Callieach to tear open the veil between the worlds. Hellish creatures pour forth, killing any who succumb to their touch. With Uther a shadow of his former self, it falls to Arthur and his loyal knights, including Lancelot, to protect the kingdom. But it will take more than just swords to vanquish their enemy and Merlin is shocked to the core when he discovers the only way to restore the equilibrium requires a sacrifice of unimaginable proportions.
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