Series 2
Mackenzie Crook as Cedric ("The Curse of Cornelius Sigan")
Adrian Lester as Myror ("The Once and Future Queen")
Alex Price as Sir William ("The Once and Future Queen")
Colin Salmon as Aglain ("The Nightmare Begins")
Beth Cordingly as Forridel ("The Nightmare Begins")
James Cosmo as Hengist ("Lancelot and Guinevere")
Michael Nardone as Kendrick ("Lancelot and Guinevere")
Sarah Parish as Lady Catrina ("Beauty and the Beast": Parts One and Two)
Adam Godley as Jonas ("Beauty and the Beast": Parts One and Two)
Charles Dance as Aredian ("The Witchfinder")
Alice Patten as Ygraine ("The Sins of the Father")
Laura Donnelly as Freya ("The Lady of the Lake")
Richard Ridings as Halig ("The Lady of the Lake")
Georgia Moffett as Vivian ("Sweet Dreams")
David Schofield as King Alined ("Sweet Dreams")
Mark Lewis Jones as King Olaf ("Sweet Dreams")
Kevin Eldon as Trickler ("Sweet Dreams")
Joseph Mawle as Alvarr ("The Witch's Quickening")
Emily Beecham as Emmyria ("The Witch's Quickening")
John Lynch as Balinor ("The Last Dragonlord")
Michelle Ryan as Nimueh (Series 1: "The Mark of Nimueh", "The Poisoned Chalice","Excalibur", "Le Morte d'Arthur")
Caroline Faber as Hunith (Series 1: "The Dragon's Call", "The Moment of Truth", "Le Morte d'Arthur")
Asa Butterfield as Mordred (Series 1: "The Beginning of the End"; Series 2: "The Nightmare Begins", "The Witch's Quickening")
Santiago Cabrera as Lancelot (Series 1: "Lancelot"; Series 2: "Lancelot and Guinevere"[11])
Rupert Young as Sir Leon (Series 2: "The Once and Future Queen", "The Nightmare Begins", "Beauty and the Beast: Part Two", "The Witchfinder", "The Sins of the Father", "The Fires of Idirsholas")
Michael Cronin as Geoffrey of Monmouth (Series 1: "Lancelot", "A Remedy to Cure All Ills", "Excalibur"; Series 2: "Beauty and the Beast: Part One", "Beauty and the Beast: Part Two", "The Sins of the Father")
Emilia Fox as Morgause (Series 2: "The Sins of the Father", "The Fires Of Idirsholas")
