The Sins of the Father
S02E08 - Airdate: 2009-11-14
Runtime: 60 min
When a mysterious warrior challenges Arthur to a duel, no one could possibly predict the devastating chain of events that is set in motion - least of all the young prince himself. Arthur and Merlin soon find themselves on a strange quest at the behest of the beautiful Morgause. Through her, Arthur discovers a dark secret which threatens to bring about the downfall of the kingdom.
Episode details and rating from TVmaze.