40 years on - give or take a few months - from the dawn of the New Wave of British Heavy Metal, the boys of the Enter Sadmen podcast choose three of the most notable albums released during the the genre-defining year of 1980.
One of them is Lightning To The Nations from Diamond Head - the band acknowledged as the inspiration behind the birth of Metallica.
One is Ace Of Spades, the classic fourth album from Motorhead, the band that essentially set the blueprint for the thrash bands who would emerge in the early 80s.
And if Deep Purple are the grandfathers of rock, then the laws of lineage demand that the final piece in this week's episode jigsaw is a band we must then view as one of its fathers - the David Coverdale-fronted Whitesnake and Ready An' Willing.