User blog comment:Morganaforever/Mordred's role in series 5 (SPOILERS AHEAD!)/@comment-1881345-20120605163258

At first I thought Mordred would be good at the start, then convert to evil, but then I started thinking...based on the info we got of him being a knight, I don't think he can be a knight of Camelot without knowing Merlin. And the last we saw Mordred, he swore revenge on Merlin and witnessed the slaughter of Alvar's men. So he can't be on good terms with Arthur and Merlin. I think that he'll go under a fake identity and probably be a spy for Morgana? (even though I don't want this, because frankly I think it's repetitive of Agravaine's role). Just really excited to see Alexandar Vlahos as Mordred! XD