Although he was never seen on-screen, John Hurt was a critical part of Merlin. He voiced the Great Dragon (Kilgharrah) and served as the narrator, which allowed him to be credited in every episode ...

John Vincent Hurt, CBE (born 22 January 1940 ... as well as BBC television series Merlin. Hurt initially came to prominence for his role as Richard Rich in the 1966 film A Man for All Seasons ...