A teenage sorceress named Nimue encounters a young Arthur on his quest to find a powerful and ancient sword.
Cast: Katherine Langford, Devon Terrell, Gustaf Skarsgård, Daniel Sharman, Sebastian Armesto, Lily Newmark, Shalom Brune-Franklin, Peter Mullan, Emily Coates, Billy Jenkins, Matt Stokoe, Jasper Jacob, Adaku Ononogbo, Clive Russell, Ashley Bannerman, Polly Walker, Sofia Oxenham
With the future of the Fey hanging in the balance and enemies closing in from all sides, Nimue sets in motion the final pieces of her plan.
Nimue weighs a fateful decision, Uther takes a defiant step, and Gawain discovers not all is what it seems within the Red Paladin camp.
With Red Paladins closing in on the Fey hideout, Nimue hatches a bold plan to buy time and secure an escape for her people.
While Niue, Morgana and Kaze seek refuge in an ancient web of tunnels, Arthur and Gawain fend off a siege led by the Weeping Monk.
In the ruins of a castle, Nimue and Merlin finally meet face to face, and more secrets from the past come screaming to the surface.
Morgana urges Nimue to use the sword for leverage. Father Carden faces a bitter humiliation, and Uther loses patience with Merlin.
On her way to Gramaire, Nimue learns of a thriving Fey resistance. Merlin butters up Lord Rugan. Iris grows suspicious of Morgana.
Waking in an abbey, Nimue finds herself surrounded by strangers and forced to attend the Red Paladins. Arthur sets out on an adventure of his own.
Shaken and alone, Nimue presses ahead on her quest, as flashbacks reveal a harrowing encounter years ago that changed the course of her life.
Scorned as a witch, a young woman with powers leaves her village to start a new life - just as a ruthless army scours the countryside for her kind.