This is the long awaited retrospective film study of the music of Black Sabbath on record, on film and on stage from 1970 to 1992. Sabbath were an inspiration to hordes of imitators and millions of fans; but until now there has never been an authoritative independent review of the factors that shaped the music. Drawing on rare footage of Sabbath in performance from 1971 right through to the last shows of the Martin era, this powerful and penetrating film features extensive reflections from inside the Sabbath camp by Tony Iommi, Neil Murray, Ozzy Osbourne, Glenn Hughes, Geezer Butler and Bobby Rondinelli, alongside the impartial and forthright views of a leading team of critics and working musicians.