Ep 5. The Knight of the Round Table

The Triplets decide to build their own version of the Camelot castle and, in the process, make such a mess of the room that the Bored Witch sends them off to the story of the Knights of the Round Table. King Arthur has acted in good faith and trusted his cousin Mordrecan, and it is only when he hears a tape the Triplets have recorded that he realizes that his cousin is really a traitor.