Guest Stars Lena Headey as Guinevere Sebastian Roché as Gawain Vernon Dobtcheff as 1st Physician Jason Done as Mordred Roger Ashton-Griffiths as Sir Boris Daniel Brocklebank as Young Merlin Jeremy Sheffield as Lancelot Timothy Bateson as Father Abbot Thomas Lockyer as Cornwall Robert Addie as Sir Gilbert Peter Woodthorpe as Soothsayer Nickolas Grace as Sir Egbert Peter Benson as 1st Architect Nicholas Clay as Lord Leo Emma Lewis as Elissa Talula Sheppard as Lady Friend Janine Eser as Lady Elaine John Turner as Lord Lot Rachel Colover as Lady Igraine Justin Girdler as Young Galahad Alice Hamilton as Young Morgan le Fay Agnieszka Kozon as Young Nimue Peter Eyre as Chief Physician John McEnery as Lord Ardente Keith Baxter as Sir Hector Billie Whitelaw as Ambrosia Paul Curran as Arthur John Tordoff as New Architect Peter Bayliss as 2nd Physician Mark Jax as Uther Pendragon
