Metal Evolution - Season 1 - Eps 6: Thrash
Next in the evolution of Metal comes a virulent strain called thrash, with the likes of Metallica, Slayer and Anthrax wreaking vengeance on hook and melody through a rhythmic discipline executed at breakneck tempos topped by harshly barked vocals.
About Metal Evolution

Title: Metal Evolution
First Air Date: 2011-11-11
Last Air Date: 2014-04-15
Status: Ended
Rating: 8.1/10 (from 27 votes)
Language: EN
Seasons: 2
Total Episodes: 12
Network: MuchMore
Genres: Documentary
Production Companies: Unknown
Synopsis
Metal Evolution is a 2011 documentary series directed by anthropologist and film-maker Sam Dunn and director, producer and music supervisor Scot McFadyen about heavy metal subgenres, with new episodes airing every Friday at 10pm EST on MuchMore and Saturday at 10pm EST on VH1 Classic. Its origins come from Dunn's first documentary Metal: A Headbanger's Journey, which included the acclaimed "Heavy Metal Family Tree."
Cast

Sam Dunn
Himself