|First Aired:||27 October 2012|
|Written by:||Jake Michie|
|Directed by:||Ashley Way|
|Guest Stars:||Rupert Young (Recurring), Eoin Macken (Recurring), Adetomiwa Edun (Recurring), Tom Hopper (Recurring), Alexander Vlahos (Recurring), Fintan McKneown, Janet Montgomery, James Fox, Hugh Holman (Uncredited) and Julian Seager (Uncredited)|
|Filming locations:||Candleston Castle, Hagia Sophia, Cannop Ponds, King Arthur’s Cave, Raglan Castle, Fforest Fawr and Puzzlewood|
Morgana makes a sinister pact with Nemeth and King Odin, using Princess Mithian as bait to lure Arthur to his death – a deception so powerful that the whole of Camelot, even Merlin, is taken in. Can the young warlock see through the lies before it is too late?