Begining of a series which will expand on the whole legends.
Uther seduces Igraine in the form of her husband Gorlois aided by Merlin's magic, conceiving Arthur after Gorlois was killed by Uther during their fight for Igraine. Gorlois' daughter, Morgan having a vision of the death of the King of Cornwall, suspects that it is not Gorlois who returns. When Arthur is born, Merlin comes to claim his prize for helping Uther so he takes Arthur, who will be raised by Ectorius. At the same time, Morgan is taken by Vivian to Avalon, where she becomes a priestess of the Old Religion. But soon afterwards Uther died with no legitimate heir. Arthur proves that he is the rightful king by drawing the sword in stone and must swear an oath to Avalon at his coronation. only then do Arthur and Morgan meet again without knowing that they are brother and sister.
clips : Mists of Avalon, Starz' Camelot
