Seizoen 1 van Merlin verscheen op 20 september 2008.

The mythical city of Camelot, in a time before history began, is a fantastical realm of legendary beasts and mysterious peoples. In this dangerous world, magic has been banned by the ruthless tyrant; Uther Pendragon. Merlin, a young man gifted with extraordinary magical powers, arrives at the gates of Camelot, sent by his mother to start a new life. Though bright-eyed with wonder, the young sorcerer quickly makes enemies, including the heir to Uther's crown, the headstrong Prince Arthur.

Seizoen 2 van Merlin verscheen op 19 september 2009.

The second series of Merlin finds Camelot more vulnerable than ever to the dark forces of magic, forcing Merlin to make difficult decisions in order to protect Arthur, ensure the future king's survival and prevent the mythic kingdom from being destroyed.

Seizoen 3 van Merlin verscheen op 11 september 2010.

Swords, sorcery and swashbuckling adventure return in the third series of Merlin, following our heroes as they face their greatest challenge yet. When misbegotten secrets are exposed and old friends choose new sides, they soon discover that the great battle for Camelot is only just beginning...

Seizoen 4 van Merlin verscheen op 1 oktober 2011.

Merlin is bac for a fourth series, with Camelot standing on the brink of a golden age. But its birth will not be an easy one, for the forces of evil are gathering and the darkest hour is just before the dawn...

Seizoen 5 van Merlin verscheen op 6 oktober 2012.

The epic fifth and final series of Merlin sees Camelot at the height of its golden age. With Queen Guinevere and the Knights of the Round Table at his side, Arthur has never felt stronger.

But even as Camelot flowers, the seeds of her destruction are being sown... As the forces of darkness gather, only Merlin stands between Arthur and a fate that has been written since the dawn of time...