The Winter King

High King Uther banishes his son, Arthur, who rescues a dying boy named Derfel; Arthur entrusts Derfel to Merlin and Nimue.

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

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

Nimue returns to Avalon, where she is found by Merlin. Merlin discovers that Nimue is pregnant but refuses to help her perform an abortion.

Derfel feels uncomfortable about the attack on the mine. Nimue aborts her pregnancy, and then is discovered by Merlin who helps heal her.

Arthur and the tribe kings enter peace talks. Arthur suggests that as a show of faith, he marry Gorfydd’s daughter, Ceinwyn.