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 …
Watch It Here : Merlin Season 5 Episode 1