Merlin: Season 2, Episode 10

2 - 10: Sweet Dreams

Dignitaries from rival kingdoms descend on Camelot for peace talks, but what King Alined really wants is war. He'll do everything in his power to stir up hostilities, even if it means using magic. Alined's jester, Trickler, puts a spell on Arthur to make him fall madly in love with rival King Olaf's beloved daughter, Vivian. Chaos reigns in the palace and Camelot is once more poised on the brink of war