Bev Bevan explores the origins of heavy metal music and Black Sabbath's homecoming gig, with interviews and music from Black Sabbath, Judas Priest and Slipknot. As the music stops, fireworks go off above Villa Park as the founders of heavy metal bow out of their unbelievable career.

Toni Iommi has confessed to feeling anxious ahead of Black Sabbath's Villa Park performance. Bang Showbiz Bang Showbiz. More Videos

Ozzy Osbourne and Black Sabbath thrilled tens of thousands of fans in an emotional farewell gig in Birmingham on Saturday following a day packed with tribute sets from a star-studded lineup. Nearly six decades after helping pioneer heavy metal with an eponymous song that enthralled and frightened audiences,