Louis Ashbourne Serkis character Alexander "Alex" Elliot
Dean Chaumoo character Bedders
Tom Taylor character Lance
Rhianna Dorris character Kaye
Denise Gough character Mrs. Elliot
Angus Imrie character Merlin
Patrick Stewart character Old Merlin
Rebecca Ferguson character Morgana
Genevieve O'Reilly character Sophie
Noma Dumezweni character Mrs. Lee
Nathan Stewart-Jarrett character Mr. Kepler
Mark Bonnar character Mr. Jeffreys
Alexandra Roach character Ms. Foster
Nick Mohammed character Mr. Hyde
Adam Buxton character Stonehenge Tour Guide
Claudie Blakley character Riding Instructor
Myra McFadyen character Punto Patty
Adam Leese character Policeman
Joey Ansah character Policeman
