Heavy hitter episode! Black Sabbath is one of the most influential bands of all time and the originator of the metal genre. In Part I of our series, we break down Side 1 of the band's second studio album, "Paranoid," diving deep into "War Pigs," "Paranoid," "Planet Caravan" and "Iron Man." Also, a music theory refresher on the tritone or "devil's interval," Geezer Butler's heart-wrenching and scary lyrics, and how four blokes from the slums of Birmingham, UK would become the fathers of heavy metal.