Georgina (recurring guest star MIchelle Trachtenberg) informs Serena that she is prepared to reveal damaging information from Serena's past, but no one is ready for what Georgina does next. Blair and Jenny escalate their "popularity war" by spreading scandalous rumors about each other through Gossip Girl. Dan witnesses Jenny's new boyfriend, Asher (recurring guest star Jesse Swenson), cheating on her, but Jenny refuses to listen to her brother's warning. Rufus goes to Lily for advice on how to handle Jenny's recent out-of-character behavior. Plus, one of the Upper East Side teens reveals that he is gay.
With Serena's life and reputation on the line, Blair -- as Serena's best friend -- decides to take matters into her own hands to deal with the manipulative and evil Georgina Sparks...
Kirsten's unemployed sister, Hailey (recurring guest star Amanda Righetti), moves in with the Cohens and disrupts the entire family when she behaves as the houseguest from hell.vanytime soon....
Having seriously dated for one week, Marissa and Ryan are progressing slowly. Summer (recurring guest star Rachel Bilson) tries to deny her true feelings for Seth as she witnesses Anna (recurring...
Sandy and Jimmy begin a new business partnership when they buy The Lighthouse, a beloved Newport restaurant. Meanwhile, Kirsten and Julie become workmates when Julie is hired as Newport Group's...
Marissa and Ryan try to start over as friends, but it's not as easy as they had hoped. As Theresa (recurring guest star Navi Rawat), Ryan's ex-girlfriend from Chino, begins spending more...
After Thanksgiving, Anna (recurring guest star Samaire Armstrong) and Summer (recurring guest star Rachel Bilson) remain upset with Seth for his behavior on the holiday, and Seth struggles to...
Seth excitedly introduces a skeptical Ryan to Chrismukkah, a Cohen family tradition that resulted from Kirsten being Christian and Sandy being Jewish. As everyone prepares for a huge holiday party...
When Julia surprises Matt having sex with both Vanessa Bartholomew (recurring guest star Kate Mara) and Ridley Lange (recurring guest star Sophia Bush), she humiliates him by demanding an...
Jessica Szohr isn't sure if Vanessa and Dan will hook-up, but likes the two characters as best friends and hints that both Vanessa and Dan will develop a friendship with Michelle...
Marissa tries to mend her relationship with Ryan, but he can't forgive her for the situation with Oliver. Things become even more complicated when Theresa (recurring guest star Navi Rawat),...
