When a mysterious warrior challenges Arthur to a duel, no one could possibly predict the devastating chain of events it sets in motion - least of all the young prince him ...

Merlin spies on the troll and steals the potion she uses to resemble Catrina, replacing it with a fake one made by Gaius. Consequently she turns back into a troll, in vie ...

Part One: An ugly old troll drinks a potion transforming herself into the glamorous Lady Catrina, who arrives at Camelot with her servant Jonas. Gaius, who has met the re ...