Colin Morgan: (about his character in Merlin) When he [Merlin] first enters Camelot, Merlin is a loose cannon. He has this natural ability which he is aware of. He has the ability to do magic but he can't control it, it just happens. He believes he will be quite safe in that environment, that he will able to use his powers in a free way. But when he enters Camelot he sees someone die for using magic so it becomes clear that using his God-given gift is a no go. And that's a big shock to him. A lot of the story deals with Merlin keeping his power a secret, even as he uses it to deal with situations.