User blog comment:Morganaforever/Series 4 Cliffhanger/@comment-4814726-20120219051458

Even though Id like to believe the second one where Aithusa is just an innocent little dragon saint and heals Morgana when he sees her, I just cant due to the Murphy interview when he said that the cliffhanger at the end would become a big part of Series 5, and when he said an old enemy returns, and that it was a mistake Merlin made in the series that would affect him in series 5. However, I have to doubt that Aithusa is EVIL, since the name means light of the sun and his birth is important to Albion. I like the last one you posted where hes a crucial part of Albion, but I dont think thats the ONLY factor. I think that Mordred is a dragonlord. Just because Gaius Balinor and merlin believe that merlin is the last, does not mean they are right. Remember when Mordred roars like merlin does after hes a dragonlord? It has the same effect and sounds the same, and Mordred's father was already long dead since the man with him who was executed was his mentor not his father, so he would have the gift. The telepathy thing is likely an added bonus he got from some other magical lineage connection, or like merlin is a dragonlord AND he gets all those extra powers as Emrys. So Aithusa wasnt being evil, not of his own accord, he was being commanded by Mordred. And mordred didnt appear because he was too far away and he just sensed that morgana was hurt, or he didnt see the point since only the dragon could heal Morgana and he couldnt. Plus he didnt want to be that close to camelot.