Tomiwa Edun

The second episode of this two parter finds the kingdom on the brink of collapse and Morgana poised to strike. As Lancelot (Santiago Cabrera) races back to Camelot with the dying Merlin, Arthur must continue on his mission to vanquish the Dorocha without them. Though the Knights know their journey to the Isle of the Blessed is fraught with danger, none could anticipate the sacrifice Arthur intends to make there. Friendship and loyalty are tested to the limit, but in the end, it's the power of love that changes all their lives forever...

Merlin faces his toughest challenge yet when Morgana's blinkered determination threatens not only Arthur's future, but the very balance of the world. With her magic stronger than ever, the sorceress summons the mighty Callieach (Gemma Jones) to tear open the veil between the worlds. Hellish creatures pour forth, killing any who succumb to their touch. With Uther a shadow of his former self, it falls to Arthur and his loyal Knights, including Lancelot (Santiago Cabrera) to protect the kingdom. But it will take more than just swords to vanquish their enemy and Merlin is shocked to the core when he discovers the only way to restore the equilibrium requires a sacrifice of unimaginable proportion...

Morgana and Helios have successfully captured Camelot and Merlin and Arthur are outlaws on the run. Trapped in Ealdor with a ruthless army closing in, their situation becomes desperate. Arthur must take control before Camelot is lost forever... But faced with Agravaine's betrayal and the strength of Morgana's force, the young King has lost his conviction. Only Merlin can restore his faith, and only an extraordinary act can prove to the King that he was born to rule. Will the young warlock convince Arthur before his dreams of Albion fall to pieces?

King Arthur leads a search party on a perilous mission when men start to disappear in the frozen north of Camelot, while Merlin soon finds himself confronting a grave threat.

When Merlin falls into Morgana's hands, he becomes a deadly weapon in her fight for supremacy. Using ancient magic, she pits friend against friend and creates the perfect assassin. An oblivious Arthur is in great danger. Will anyone notice Merlin's unusual behaviour before he does the King some serious harm?