Camelot S01 E09 The Battle of Bardon Pass

Morgan makes her escape, leaving a puzzled Igraine believing she is going mad until Merlin explains Morgan's deception. They go to Castle Pendragon to confront her but end up as her prisoners. Leontes, now aware of his wife's infidelity, prepares to depart Camelot but joins Arthur and the knights in defending Bardon Pass.