Merlin (2008)

S02E05 Beauty and the Beast (1)

Lady Catrina and her peculiar servant, Jonas, arrive in Camelot, where a thrilled King Uther eagerly welcomes them. Uther is quickly enchanted by Catrina, but Arthur is far from impressed, feeling uneasy about the flirtation unfolding before him. Meanwhile, Merlin and Gaius suspect that Lady Catrina may not be what she appears to be. Their fears are confirmed when Merlin uncovers the shocking truth: Catrina is actually a troll with sinister plans that extend beyond winning the king's heart. Determined to save both Uther and Camelot, Merlin must find a way to expose her true nature before disaster strikes.