Michael Cronin

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...

Uther's past comes back to haunt him when a mysterious Black Knight rides into Camelot. The visitor quickly makes his presence felt, throwing down his gauntlet and challenging the Knights of Camelot to mortal combat. As the formidable fighter picks off his opponents one by one, it becomes clear he cannot be beaten; is it just his superior skill, or is there something more sinister behind his invincibility? With Arthur set to face this deadly foe, will Uther overcome his pride and do the right thing, or is the truth too difficult to face?

Newly crowned Queen Catrina settles in as Camelot's first lady. As her true troll nature surfaces, her influence over Uther increases, and the repercussions are felt throughout the kingdom. When Catrina accuses Merlin of stealing, he is forced into hiding. Forced to sneak around the castle, Merlin must find a way to expose Catrina's true form without getting caught, and beheaded. Will this be enough to break her powerful magic?

Uther is captivated by his latest guest, the beautiful Lady Catrina. Arthur is appalled by his father's flirting, but Merlin is wary for a different reason - he suspects she is really a troll! Catrina and her strange servant are welcomed into the heart of Camelot, and it is up to Merlin to prove she is a monster and save Uther. However, Catrina has her sights set on a far greater prize than the King's heart.

Arthur is pressured into an arranged marriage with a visiting Princess, Elena. Merlins reservations are vindicated when he discovers Elena may not be exactly who she claims to be. Whilst trying to uncover the dark secret hidden inside her, Merlin learns that Elenas nanny is a Pixie. But who is she working for? And what do they have to gain from this marriage? Can Merlin get to the bottom of this mystery before Arthur makes the biggest mistake of his life?