‘Merlin: The Diamond of The Day’ Part 1 airs, Saturday 22 December at 7.55-8.40pm on BBC One.
High in the mountains a great horde gathers; Morgana prepares for war with a vengeful Mordred at her side.
Merlin feels the weight of his destiny like never before as the ancient prophecies play out with terrifying accuracy. But before he can save his beloved Camelot, he must save himself. For it is not just the kingdom Morgana wishes to destroy – it is also Emrys.
Do not miss this penultimate episode in the epic final series of Merlin.
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