 His first appearance was in 1966 in "The Investigation" and in the years that followed he became a core member of the company, taking on three or four major roles each season.Known for his strong and authoritative voice, Stewart has lent his voice to a number of projects.He has narrated recordings of Prokofiev's "Peter and the Wolf" (winning a Grammy), Vivaldi's "The Four Seasons" (which had also been narrated by William Shatner), C. S. Lewis's "The Last Battle" (conclusion of the series "The Chronicles of Narnia"), Rick Wakeman's "Return to the Centre of the Earth"; as well as numerous TV programmes such as "High Spirits with Shirley Ghostman".