2x23: The Wrath Of Con
BLAIR'S NIGHTMARE / SEBASTIAN STAN GUEST STARS Chuck (Ed Westwick) discovers a family heirloom and is forced to face his feelings for Blair (Leighton Meester). Blair confides in Serena (Blake Lively) that her night of passion with Carter Baizen (guest star SEBASTIAN STAN) might have had undesired consequences, unaware they are not alone. Dan (Penn Badgley) finds out his admirer hits close to home. Nate (Chace Crawford) and Carter have another face-off, with unexpected help from Jenny (Taylor Momsen). Jessica Szohr also stars.
2x24: Valley Girls
EPISODE FEATURES GUEST STARS BRITTANY SNOW, KRYSTEN RITTER, 80S ICON ANDREW MCCARTHY, MICHELLE TRACHTENBERG AND A PERFORMANCE BY NO DOUBT
In a flashback to the 80s, 17-year-old Lily Rhodes (Snow) gets kicked out of boarding school and runs away to Los Angeles, reconnecting with her parents, Rick (McCarthy) and Cece (guest star Cynthia Watros, "Lost"), and sister, Carol (Ritter). Back in present day, Blair (Leighton Meester) and Nate (Chace Crawford) attend prom together, but the evening doesn't turn out exactly as planned and Chuck (Ed Westwick) has a little something to do with that. Serena (Blake Lively) and Lily (Kelly Rutherford) don't see eye-to-eye over Serena's recent run-in with the law. No Doubt performs in the episode as an 80s band called "Snowed Out." Penn Badgley, Taylor Momsen, Jessica Szohr and Matthew Settle also star.