After a run-in with Bart, Blair is concerned for Chuck's safety and devises a plan with Serena, Georgina and Sage.

Cast: Blake Lively, Leighton Meester, Penn Badgley, Chace Crawford, Ed Westwick, Kaylee DeFer, Kelly Rutherford, Matthew Settle, Hina Abdullah, Sofia Black-D'Elia, Robert John Burke, Sam Robards, Michelle Trachtenberg, Jessica Abo, Ryan Castro