Well this is it. The end is nigh and things are really not looking good for Camelot as Morgana and her new ally Mordred ready for war in the epic first half of the Merlin finale, The Diamond of the Day.

TV trailer:

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.

It airs Saturday 22 December 7.55pm on BBC1.