War at the Roses
Blair is caught off-guard – and not in a good way – by a surprise guest at her birthday party. Having had enough of Chuck and Blair's games, Serena and Nate decide to plan an intervention.

Cast
Blake LivelySerena van der Woodsen
Leighton MeesterBlair Waldorf
Penn BadgleyDan Humphrey
Chace CrawfordNate Archibald
Ed WestwickChuck Bass
Kaylee DeFerIvy Dickens
Matthew SettleRufus Humphrey
Kelly RutherfordLily van der WoodsenGossip Girl on tvt

