Inside Black Sabbath - 1970-1992

Starring: Black Sabbath , Ozzy Osbourne

RS: 2.5of 4 Stars

Thirty years before The Osbournes recast Ozzy as a palsied dad, the tragicomic maniac was already brushing his teeth with a broom, as seen in this unauthorized documentary on his primal metal band. Blending utterly terrifying early performance footage with guitarist Tony Iommi relating the story of his mangled hand, the film falters mostly when balding British critics strain to make the case for Sabbath's third-string singer Tony Martin.