User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Ruadan - an enemy of both Arthur and Morgana?/@comment-4623180-20121001104851

Remember the first whispers of Liam Cunningham (Ruadan) appearing in Merlin were when he tweeted he plays a corpse in a scene with Richard Wilson. This info is stated early on the Series 5 page. Not sure if it is solid proof, though, that he is playing a corpse in Merlin, but Richard only directs plays (small enough that we don't know much about and that an actor like Liam wouldn't be involved in) so I'm quite sure it would be Merlin. Unless the tweet was bogus, of course, which I doubt.

Also, in recent interviews (the latest ones, scans can be found through the Series 5 page once again) it stated Ruadan is appearing in the opening two-parter.

So yeah, that puts that at rest. I personally speculate Ruadan is part of a band of dark druids or druids against those who persecute Arthur (so non-peaceful ones). Perhaps they infiltrated the bandit king's fortress and saved Morgana. She has reason to be pissed off at him in the scene that was posted by EmrysOfAlbion yesterday- they couldn't get to her for 2 years.

Ruadan is a druid, Mordred is a druid, does this perhaps say something?

I do hope we get to see or learn lots about how Morgana is freed. I highly predict Mordred is involved. I don't know where on earth Aithusa was the whole time. We know she is definitely Morgana's confidant (doing it because she sees the good in what Morgana is doing, and since there is no 'good' or 'evil' in magic), so where was she? Unless she wanted Morgana to be a captor..

It's also reassuring that Katie said in an interview we'll learn more about her captor later on. I wonder why later on...

So it can't be Ruadan, as he will be only be in the two-parter and is said to be a corpse. That was said during early shooting, so he dies early. So he can't be this captor we learn about later on.

Edit: Unless of course, Ruadan is "faking" a corpse. ;)