After some initial hostility, the nobles unite behind Arthur as their rightful king. Merlin leaves, thinking the kingdom is finally at peace, but Mab instructs Frik to seek out Morgan (Helena Bonham Carter) and poison her mind by making her beautiful, and has her seduce Arthur, who is unaware of their relationship. Merlin races back to Camelot to confront Arthur. Morgan gives birth to Mordred (Jason Done), whom Mab raises to become Arthur's downfall. Arthur starts construction of his castle of Camelot and marries Guinevere.