Arthur (Jamie Campbell Bower) strolled into dinged-out Camelot looking all bummed, like "Dude, someone stole my sex wax." Apparently his one-night stand with Guinevere (Tamsin Egerton) didn't change everything. At least not the way he wanted things to change.
And then he pulled himself together and barked some orders at a flunky to get his knights together for a little swordplay. After a little bit of training, dude-king's sword was broken in half, so Merlin set out to find him a great sword and sword-maker. Rather than have the kid, you know, practice. But before Merlin set out, he told his charge that he better get his act together in regard to Guinevere — specifically, he should dump her and fast.
Guinevere got a more subtle but similar smack-down from Arthur's mother Igraine (Claire Forlani), and then she in turn did the same to Arthur, rebuffing his advances when he tried to charm her by looking intense a la The Tudors' Jonathan Rhys Meyers. Dude, there's only one Jonathan Rhys Meyers. I might be more tolerant of this callow kid if he were still Wart and not already King.
Naughty Morgan Le Fay (Eva Green) is having a bad time of it too, scaring her servant Vivian (Chipo Chung) and herself. She's feeling sick and cold and going through some sort of magical withdrawal. She's even frightened by a nun (Sinead Cusack). The nun, apparently her former teacher, may be the only one who can help her. "I have one thing left to teach you. You must learn to die." Doesn't sound so helpful.
The nun, or whoever she really is, created a sort of fun house hall of mirrors, and placed Morgan in the middle, where she and Morgan and are haunted by reflections, known and unknown. But she doesn't seem able to exactly "cure" Morgan. Rather, she seems to have amped up her shape-shifting abilities.