Title: War At The Roses
Air Date: November 1, 2010 at 12:00 AM PDT
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. Musical guest Robyn performs in the episode. (From CWTV.com) Read the full recap here.