Merlin

New servant, Cedric (Mackenzie Crook), muscles in on Merlin's position as Arthur's right-hand-man and turns the prince against his loyal friend. Merlin is convinced the slippery newcomer is up to something and he's right - Cedric is a conman and a thief who's after a magnificent jewel recently unearthed in a tomb far beneath Camelot.

Merlin helps Arthur disguise his identity to enter a jousting tournament, little knowing that a deadly assassin has arrived in Camelot to kill the Prince.

When Morgana begins to fear she might have magic, Merlin puts both their lives at risk to get her the help she needs.

When Gwen is kidnapped Arthur defies the King to go to her rescue, but someone else gets there first: Lancelot.

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!

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.

Uther is determined to wipe out magic in Camelot once and for all, and this time no one is beyond suspicion. He summons the most dreaded witchfinder in the land, Aredian (Charles Dance), a terrifying man who will stop at nothing to uncover sorcery. Gaius impresses upon Merlin how much danger he's in but Morgana needs no such warning.

When a mysterious warrior challenges Arthur to a duel, no one could possibly predict the devastating chain of events that is set in motion - least of all the young Prince himself. But Arthur and Merlin soon find themselves on a strange quest at the behest of the beautiful Morgause (Emilia Fox). Through her Arthur discovers a dark secret, which could bring about the downfall of the kingdom.

Merlin meets a kindred spirit but his new friendship is threatened when a deadly magical beast attacks Camelot.

Dignitaries from rival kingdoms descend on Camelot for peace talks, but what King Alined really wants is war and he'll do everything in his power to stir up hostilities, even if it means using magic.

Uther has a precious magical relic of the Old Religion locked up tight in the Camelot vaults. Many have lost their lives trying to reclaim the Crystal of Neahtid, but the ruthless warlock Alvarr could succeed where they failed.

As Morgause and her inhuman Knights attack a helpless Camelot, Merlin’s loyalties are stretched to the limit.

When the Great Dragon attacks Camelot, Merlin must go on an epic journey to find the one man who can defeat the monster.