A metalhead is a member of the heavy metal subculture. CMJ described "New American Gospel" as "grindcore and death metal for the metalhead kids". A metalhead is a fan of heavy metal music. The line includes Leo, Donnie, Raph, Mikey, Splinter, Shredder, Slash, Metalhead, and Tiger Claw. Brodie is a metalhead, which conflicts with Uncle Albert's fundamentalist Christian beliefs. Grieving, Donatello ponders over one day being able to rebuild Metalhead. Rantanen and his friends from the Finnish "metalhead" community began writing and recording songs. The audience reportedly included both the "pumped-up metalhead" and the "costumed kawaii kid". Also, Donatello can speak through Metalhead. Donatello managed to defeat Metalhead by crashing a support pillar on it. The episode entitled, "Metalhead", was directed by "Hannibal" and "American Gods" director, David Slade. "Metalhead" has been described as genre fiction and low concept. I was a metalhead through and through. Slash is later seen being kept as a prisoner of the Kraang in "Metalhead Rewired". Wave 2 featured Metalhead, Fishface and Dogpound.