Merlin arrives in Camelot, where he meets Gaius, the court physician, and Arthur, a bully who challenges him to a duel.
The annual sword tournament at Camelot has arrived.
Merlin and Gaius race to find a cure for a deadly plague that is spreading through Camelot.
Evil sorceress Nimueh returns and tricks Merlin into drinking from a poisoned chalice.
Merlin is saved from a terrible fate by a heroic stranger known as Lancelot.
A stranger charms his way into Camelot's court.
Colin Morgan
Merlin
Bradley James
Arthur Pendragon
Richard Wilson
Gauis
Angel Coulby
Gwen
Katie McGrath
Morgana