Guess who's going to Camelot for the Mix 'n' Match Virus!

... That said, I've never seen Merlin and I'm not all that up on my Arthurian legends, so if anyone who's familiar with the series could fill me in on stuff it'd be great? XD GENERAL PLOTTING FOR THE CAST HERE WOULD BE AWESOME TOO, JUST SO I KNOW WHAT REGINA SHOULD BE DOING