User blog comment:Morganaforever/Episode Review: Arthur's Bane Part 2! SPOILERS!/@comment-4892425-20121013233727/@comment-4650675-20121013235159

We still don't know how she got out and got her powers back. And yes, both her and Aithusa look like they had it rough!

It probably has to do with Uther's ghost. It doesn't have to do with Morgana, as she doesn't appear in episode 3.