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.

Hours after Lamb of God covered Black Sabbath’s "Children of the Grave" at Ozzy Osbourne’s farewell concert, the band released a studio version of the track.

Ozzy Osbourne took his final bow after reuniting with the original lineup of Black Sabbath to play a farewell concert before a crowd of over 40,000: 'Thank you from the bottom of my heart.'