User blog comment:Emily Windsnap/MY AMAZING THEORY!!!/@comment-5995315-20130213194514

Well, it makes sense that the reason we have this series about Merlin is that Merlin himself is still alive and wants his story told. He can also switch back and forth between old and young Merlin depending what mood he's in. I don't know if Merlin and Colin Morgan are the same persons, but the finale  does pose that question to viewers.

They might not be the same, but  it may have happened that Merlin took over Colin Morgan's mind while he was acting so that Colin would portray Merlin exactly the way Merlin wanted. After all, he is the most powerful sorcerer and doing that wouldn't be any trouble. It might even be Merlin who chose Colin for the role in the first place. Nobody has ever explained how Colin got the part.