This episode packed a lot of punches into a very short time, so this essay has a lot of play-by-play. Sorry about that.
We begin with Nimue turning a dead knight into a zombie. Cut to Arthur's 21st birthday party and investiture as Crown Prince, which if I remember correctly means he will no longer have to have a Regent appointed when his father dies but can assume the throne directly. Why do I feel an inappropriate birthday present coming up?
(Geez hon, most people settle for a bottle of whiskey or a blow-up doll.)