High King Uther banishes his son, Arthur, who rescues a dying boy named Derfe...
The Winter King
Season 1 Episode 9
Derfel and Morgan take Bedwin's body back to Arthur. Ceinwyn reveals that Gorfydd is allying with the Saxons. Derfel discovers that the Christians died of natural causes, but Arthur reveals he has exiled Nimue to the Isle of the Dead.