Gossip Girl Season 2, Episode 20, "Remains of the J," follows the disastrous, riot-inducing sweet sixteen party thrown for Jenny Humphrey, which leads to her reclaiming her identity and Serena's abrupt departure for Spain. The episode also features Chuck and Vanessa's unexpected alliance and the introduction of a new, complex scam artist plotline. Read the full recap at Vulture . "Gossip Girl" Remains of the J (TV Episode 2009) - IMDb