King Arthur faces his doom as his kingdom is undermined from within by the love of his queen for Sir Launcelot, and the treachery of Mordred, his son born of incest.
| Actor | Role |
|---|---|
 Jeremy BrettKing Arthur | King Arthur |
| RRoland AlexanderSir Gawaine | Sir Gawaine |
| JJohn BartonSir Thomas Malory | Sir Thomas Malory |
 Barbara KellermanQueen Guenevere | Queen Guenevere |
 David RobbSir Lancelot | Sir Lancelot |
 Nickolas GraceSir Mordred | Sir Mordred |
| AAnton DolinThe Archbishop of Canterbury | The Archbishop of Canterbury |
| RRoy JonesSir Bors | Sir Bors |
 Frederick WarderSir Agravaine | Sir Agravaine |
| BBarrie YoungSir Bedivere | Sir Bedivere |
| MMaurice LaneSir Pettipace | Sir Pettipace |
| JJona JonesSir Gareth | Sir Gareth |
| GGraeme EdlerSir Gaheris | Sir Gaheris |
| JJohn ThorntonSir Urre | Sir Urre |
| VVal MeredokQueen | Queen |
| CCheryl PayQueen | Queen |
 Judi TrottQueen | Queen |