- Episode Name:Diamond of the Day - Part 1
- Air date:12/22/2012
- Summary:High in the mountains a great horde gathers; Morgana prepares for war, 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. Yet before he can save his beloved Camelot, he must save himself. For Morgana wishes to destro