Martin doesn't take kindly to the influx of holiday-makers, and his attempts to point out the dangers of sunbathing to one woman don't come across very well.
Merlin must reveal that Camelot's new Queen is a troll before she destroys the kingdom.
Uther summons a witchfinder to Camelot to root out magic once and for all. Will Merlin and Morgana be sent to the flames?
When Morgana begins to fear she might have magic, Merlin puts both their lives at risk to get her the help she needs.
When the Great Dragon attacks Camelot, Merlin must go on an epic journey to find the one man who can defeat the monster.