The most intriguing twist in the TV series Merlin was the portrayal of Camelot as a kingdom in the grip of an anti-magic crusade. That meant that the series protagonist — a young incarnation of the famous titular wizard — was essentially living like an X-Man, forced to keep his sorcery skills hidden even from his closest friends. On this week’s episode of Merlin, the titular young wizard has to make a pivotal decision to save the wizard-hating King Uther using sorcery. In this exclusive clip, Merlin has a heated exchange with his friend and mentor Gaius. Check out the video below, and start getting excited for what promises to be a major turning point in the Merlin mythology.