Season 5
13 episodes
44 min. per episode
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A young sorcerer hides his magic while forging an unbreakable bond with a destined prince, facing threats that could shatter Camelot.
Episodes
Arthur has been king for three years without incident, but now an expedition north to the land of Ismere, led by Gwaine and Percival, is captured by Morgana and fellow sorcerer Ruadan and set to work in the mines to locate a mystical key. A search party headed by Arthur and Merlin goes after them, coming upon a village whose inhabitants have been massacred, A dying Druid warns Merlin of Arthur's bane - a battle where the young king will be slain. Ruadan's daughter Sefa is a spy working as Guinevere's maid, who warns her father of Arthur's army heading for Ismere through the lands of his ally Queen Annis. The group is thereby ambushed and Merlin and Arthur captured by Mordred, whom Merlin recognizes from the prophecy as being Arthur's killer.
Ruadan rescues his daughter but is fatally wounded in the process. Merlin and Arthur are route-marched to Morgana's wintry hide-out. Mordred shows them some kindness but Merlin, having glimpsed the future, mistrusts him. Merlin and Arthur escape and arrive in the mines below the castle, where they free all the slaves and meet a spirit called the Euchdag, who is herself the Diamar, the "key" which Morgana had been seeking. Mordred saves Arthur from Morgana's attempt to kill him and is rewarded with a knighthood on the return to Camelot. Merlin remains wary despite the Euchdag telling him that Arthur's bane is Arthur himself, not Mordred.
Arthur rescues an old lady accused of sorcery, who gives him a horn with which to summon the spirit world. Despite Gaius's warning, he uses it to briefly meet his father but soon realises his error as Uther terms him weak for his non-political marriage, his practice of knighting ordinary young men on merit, and his lack of cruelty to make his subjects fear him. When Camelot falls prey to poltergeist attacks, with Guinevere the principal victim, it becomes clear that Arthur has unwittingly released his disapproving, vengeful father's spirit on the court. With a potion made by Gaius to make the spirit visible, and with Merlin's help, he sets out to return Uther to the grave, delivering a few home truths before it goes.
With the help of King Odin who blames Arthur for the death of his son Morgana invades the Kingdom of Nemeth in another attempt to take over Camelot. While Odin holds King Rodor of Nemeth hostage Morgana in disguise as a lady in waiting and Princess Mithian seek help from Arthur and his knights
The druid Osgar delivers the judgment of the disir to Arthur.
These are the brand new adventures of Merlin, the legendary sorcerer as a young man, when he was just a servant to young Prince Arthur on the royal court of Camelot, who has soon become his best friend, and turned Arthur into a great king and a legend.