Episode 3 (S01E03)

Arthur captures Gundleus, holding him as a prisoner. Meanwhile, Nimue grapples with the emotional scars from her assault and plots to take revenge on Gundleus. Arthur discovers that Gundleus' uncle, Gorfydd, is gearing up for battle. In her quest for vengeance, Nimue attempts to involve Derfel in her scheme, but he remains loyal to Arthur and refuses to turn against him.