Sam Neill

as Merlin

2 episodes

Paul Curran

as Arthur

2 episodes

Isabella Rossellini

as Nimue

2 episodes

Jeremy Sheffield

as Lancelot

2 episodes

Lena Headey

as Guinevere

2 episodes

Martin Short

as Frik

2 episodes

Mark Jax

as Uther

2 episodes

Helena Bonham Carter

as Morgan le Fay

2 episodes

Rutger Hauer

as King Vortingern

2 episodes

Miranda Richardson

as Lady of the Lake

(+1 more)

2 episodes

John Gielgud

as King Constant

2 episodes

James Earl Jones

as Rock of Ages

2 episodes

Roger Ashton-Griffiths

as Sir Boris

2 episodes

Nicholas Clay

as Lord Leo

2 episodes

Daniel Brocklebank

as Young Merlin

2 episodes

Billie Whitelaw

as Ambrosia

2 episodes

Jason Done

as Mordred

2 episodes

John McEnery

as Lord Ardente

2 episodes

Christian Simpson

as Vortigern's Guard

2 episodes

Sebastian Roché

as Gawain

2 episodes

Timothy Bateson

as Father Abbot

2 episodes

Vernon Dobtcheff

as 1st Physician

2 episodes

Joseph Mawle

as Village Man (uncredited)

2 episodes

Thomas Lockyer

as Cornwall

2 episodes

Agnieszka Koson

as Young Nimue

2 episodes