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