Camelot's legendary tournament only has one rule: there are no rules whatsoever. Terrifying warriors start to fill the mythical city, Gilli between them. Despite his small stature, Gilli is ready to join the action and committed to achieve victory with a secret weapon to help him: magic. When Gilli begins to realise the full extent of his powers, Merlin becomes torn since his new friend is putting his own life in danger as well as threatening the very heart of Camelot with his actions. Will Merlin be able to make Gilli see sense before it's too late?
Elenco: Colin Morgan , Bradley James , Angel Coulby , Katie McGrath , John Hurt , Richard Wilson , Eoin Macken , Katie McGrath , Richard Wilson , Rupert Young , Santiago Cabrera , Tom Hopper .