Guest Stars James Purefoy as King Lot Sean Pertwee as Ector Sebastian Koch as King Uther Lucy Cohu as Arthur's Foster Mother Co Starring Diarmaid Murtagh as Brastias Jamie Downey as Ulfius Caoimhe O'Malley as Scullery Girl George McMahon as Messenger Adam Goodwin as Pellinor Brian McGuinness as Nentes Colin J. Maher as Duke of Cornwall Fergus Kealy as Scotland David Coakley as Lot's Outrider Hope Brown as Old Duke of Cornwall Mieke Dockley as Anna John Benfield as Alded Joe Doyle as Uriens Ian Bartholomew as Catrain