Season 4 Episode 2 episode 2 Gossip Girl Season 4 Episode 2 "Double Identity": Sneak Peek! 09.14.2010. @ 21:21 Iris Earlier today, we posted a promo for next week's episode of Gossip Girl! Now we've got a sneak peek featuring Gossip Girl's very own BFF's: Serena and Blair! Now go on, check it out!