Metal Evolution presents 11 episodes based on the much-debated Metal History "family tree" originally shown in Headbanger's Journey. This 24 sub-genre genealogical chart reveals the vast complex progeny of heavy metal--from Early Metal and Shock Rock to Thrash, from Progressive Metal to Grunge and Nu Metal. Arguably metal's most popular and passionate genre, music documentarian Sam Dunn journeys to Northern California to trace the roots of Thrash by interviewing the architects of this hugely popular genre. Season 1 Episode 6 (S01E06) "Thrash" Documentary airs tonight, Saturday, December 31 at 10:00 pm ET on VH1 Classic.
