Guest Stars Lena Headey as Guinevere Sebastian Roché as Gawain Jason Done as Mordred Peter Woodthorpe as Soothsayer Peter Benson as 1st Architect Nickolas Grace as Sir Egbert Roger Ashton-Griffiths as Sir Boris Daniel Brocklebank as Young Merlin Vernon Dobtcheff as 1st Physician Jeremy Sheffield as Lancelot Peter Bayliss as 2nd Physician Thomas Lockyer as Cornwall Robert Addie as Sir Gilbert 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 Nicholas Clay as Lord Leo John McEnery as Lord Ardente Keith Baxter as Sir Hector Billie Whitelaw as Ambrosia Paul Curran as Arthur John Tordoff as New Architect Mark Jax as Uther Pendragon Timothy Bateson as Father Abbot Peter Eyre as Chief Physician
