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Derfel finds Nimue inside the Isle of the Dead; guilt ridden by the deal he's been forced to make with the Saxons, Arthur vows to fight to save Britain.

The Winter King

Gorfydd allies with the Saxons and declares war; Arthur admits he exiled Nimue to the Isle of the Dead.

The Gathering Dark

Arthur believes that Bedwin will be able to negotiate peace with Gorfydd; however, when Morgan and Derfel arrive in Powys, they discover a horrific sight.

Hold The Night

Arthur and Guinevere meet secretly before Arthur and Ceinwyn are to be married.

Arthur and the tribe kings enter peace talks; Arthur meets Guinevere, Ceinwyn's lady-in-waiting, while traveling.

The Offer

Derfel feels uncomfortable about the attack on the mine, which Owain keeps a secret; Tristan, prince of Kernow, demands justice for the raid at the mine.

Nimue returns to Avalon, where she is found by Merlin; Derfel and Owain travel to collect taxes from King Cadwys; Gundleus returns to Caer Cadarn.

Arthur takes Gundleus prisoner, and Nimue begins to plan her revenge; Arthur learns that Gundleus' uncle Gorfydd is preparing for war.

Legacy Of Madness

An untimely death leads Merlin to locate Arthur and urge him to come back to Britain; chaos ensues when Gundleus assaults Avalon.

King Uther banishes his son Arthur; Arthur rescues a boy named Derfel whom he entrusts to Merlin.

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A former warrior now turned monk, tells the story of how Arthur Pendragon became the lord of war.

S1 E1 | The Winter King