Scar Tissue were an American electro-industrial group formed in Oakland, California, United States with Philip Caldwell and Steve Watkins forming the band's creative nucleus. They released three albums for 21st Circuitry: Separator (1996), TMOTD (1997) and Rebuild (1998). After a ten year hiatus Scar Tissue reunited in 2008 to release the dark electronic album Potential, which they followed up on two years later with 2010's Obscurity.