Dark Ages wizard Merlin, weary of the barbarism around him, creates a new order of enlightenment and justice with a youthful Arthur at its head. Merlin gifts Arthur with the magic legendary sword Excalibur to help him defeat the nobles who oppose his rule. But Arthur must also beware his half-sister Morgan, a sorceress who has sworn to kill him to avenge her father's death. As Morgan intensifies her plans for revenge, she uses magic to draw Lancelot and Guinevere into a passionate affair. However, it is the still more traitorous Mordred who will ultimately determine the fate of Arthur's rule.

Robert EddisonMerlin

Anthony DuttonAccolon

Brian CoburnKing Uther Pendragon

Anne KiddIgraine

William Morgan SheppardGorlois

Richard BealeSir Ector

Martin ChamberlainSir Kay

Jon CroftLot

Richard AustinYoung Arthur

Patsy KensitYoung Morgan

Hilary MasonMidwife

Terence SoallBard

Andrew BurtKing Arthur

Felicity DeanQueen Guinevere

David RobbSir Lancelot

Maureen O'BrienMorgan le Fay

Godfrey JamesSir Bors

Ivor RobertsLeodograunce

Peter BurroughsBranic

Geoffrey BatemanSir Gawain

Steve HodsonMordred

Niall PaddenAgravain

Archie TewGareth

Geoffrey BeeversGraminore

Denis CareyKing Pelles

Emma JacobsElaine

Tim WyltonGuido de la Porte

Kevin StoneyHermit

Amanda WisslerEleanor

Raymond MasonVavasour

Eric FrancisVavasour's Servant

Barry HallidayMador de la Porte

James SimmonsSir Galahad

Eileen NicholasMargaret

Donald EcclesNaciens

David HenryDark Knight

Tom KellySir Bedivere

Peter GuinnessGirflet

Hilary MinsterArcon

Margot Van der BurghSir Bors' Wife