who played Merlin's tutor and guardian Gaius. Besides a few episodes where he was enchanted, Gaius was a generally kind but reserved character, who took his duties as Merlin's mentor and Camelot's ...

9. Love in the Time of Dragons - An old flame of Gaius’s returns to Camelot, but Merlin’s loyalty is tested when he learns she is using dark magic to plot against Uther. More info ...