Merlin: Season 3, Episode 11

3 - 11: The Sorcerer's Shadow

As another tournament descends on Camelot, a young man known as Gilli sets his sights on victory. Gilli uses magic in the tournament to increase his chances of victory, and by doing so he begins to realize the true strength of his powers, and what he could possibly use them for. Merlin is torn between two options: Will he choose to help Gilli or to save Camelot?