In 1984, Greg Hetson of Circle Jerks fame, who had played the guitar solo for "Part III" on "How Could Hell Be Any Worse?", teamed up with Graffin on the song "Running Fast" for the soundtrack of the film "Desperate Teenage Lovedolls". Soon after, Graffin reassembled Bad Religion with Hetson replacing Gurewitz, who had gone into rehab for his drug problem. Bad Religion returned to a somewhat mellower, rock and roll version of their original sound with the EP "Back to the Known" (1985), but disbanded temporarily soon after.