The Diamond of the Day – part 1
|First Aired:||22 December 2012|
|Written by:||Jake Michie|
|Directed by:||Justin Molotnikov|
|Guest Stars:||Rupert Young (Recurring), Eoin Macken (Recurring), Tom Hopper (Recurring), Alexander Vlahos (Recurring), Peter Guinness, Erin Richards, John Lynch and Darren Swain (Uncredited)|
|Filming locations:||Caerphilly Castle, Puzzlewood, Clearwell Caves and Trefill Quarry|
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.