Merlin

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.

As dawn breaks across the icy tundra, Merlin and Arthur are close to exhaustion. With each tortured step, the fortress of Ismere looms ever nearer, and Merlin's fear intensifies as he wonders what game Mordred is playing and what powerful secrets Morgana and the druid Ruadan search for amongst its twisted catacombs.

When a stranger gives Arthur the power to summon the dead, the king finds himself torn between head and heart. Unable to resist temptation, he seizes the chance to speak to the person he misses most, his father, Uther. However, the spirit world is a dark and dangerous place, and little does Arthur realise that his decision comes at a terrible price.

With Princess Mithian as the perfect bait, Morgana conjures a deception so powerful that the whole of Camelot gets taken in - even Merlin himself. As the storm clouds gather, the young warlock must see through the lies to stop Morgana from fulfilling her long-held dreams of revenge.

In the inky depths of an ancient pool, three soothsayers cast a dark judgment upon the king of Camelot. Despite Merlin's warnings, headstrong Arthur refuses to take the words of the Disir seriously, and their fury rains down on Camelot. Only the greatest sacrifice can appease them, and with the kingdom in jeopardy, is it one that Arthur is prepared to make?

After visiting her father's grave, Guinevere is captured by Morgana and imprisoned in the infamous Dark Tower haunted by ghostly visions and screams. Merlin and Arthur lead the knights in a rescue mission but get lost in the thick and aptly named Impenetrable Forest.

After Arthur is unseated from his horse, his saddle is shown to have been tampered with and stable groom Tyr Seward blamed. Imprisoned, he tells Merlin he saw the true culprit but was told his mother would die if he informed on them.

Earnest young druid Daegal begs Merlin to come to his village and save his dying sister, but the boy leads him into a trap where he's left to die by Morgana.

Merlin knows he must act fast before Morgana's twisted control over Gwen gets further out of hand. Only the most powerful magic can save the queen, and this will not be easy, even for Merlin. As the high priestess tightens her grip on Camelot, it becomes clear that she will not give up her puppet without a fight.

Morgana leads a terrifying pursuit of her old foe, Alator of the Catha, for she knows without doubt that he can tell her exactly where to find Emrys. Merlin's life has never been in more danger, so when the mysterious Finna offers to help him, he must ask himself whether it is right to trust her or if he will find himself cornered with nowhere to run.

Merlin sees Mordred helping Kara, a wounded Druid with whom he was once in love, but agrees to keep it secret. Later Kara tries to kill Arthur and is sentenced to death, with Arthur turning down Mordred's pleas for mercy.

High in the mountains, 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, yet he must first save himself before he can save Camelot.

With Arthur's forces outnumbered, Merlin arrives in his guise as the aged sorcerer to defeat Morgana's army with magic. Arthur kills Mordred but is wounded and rescued by Merlin, who reveals that he is a wizard.