Adam lets it slip that Barry never completed his community service requirement, so the brothers join together to throw the greatest breakdancing battle in the history of William Penn. Geoff's stress levels are at an all-time high, so Erica makes an adult decision and plans for them to follow the Grateful Dead all summer. Finally, it's the end of an era when the JTP (The Jenkintown Posse) graduates from high school. (thetvdb.com)