The bracing, uncompromising primitivism of Ozzy Osbourne and Black Sabbath comes to life in performances of 'Paranoid,' 'NIB,' and 'WarPigs.' Steppenwolf, who fatefully used the term 'heavy metal,' in their hit 'Born to be Wild,' deliver that song in hyperdrive. Deep Purple's 'Smoke on the Water' and Thin Lizzy's 'Dedication' remind us of those band's sheer theatricality - and of course Led Zeppelin gives an astounding, extended performance of the classic 'Stairway to Heaven,' as well as showcasing mindblowing chops on 'Whole Lotta Love.' With Iron Maiden showing just what could be dome by a metal band in the midst of the punk-rock explosion, this program is an amazing series of performances - and a devasating rock explosion.