Season 3, Episode 17 | April 5th, 2010
Chuck (Ed Westwick) and Blair (Leighton Meester) are faced with the most difficult decision they have ever faced as a couple. Serena (Blake Lively) plans a surprise birthday party for Nate (Chace Crawford), but Jenny (Taylor Momsen) does her best to sabotage Serenas’s efforts. Dan (Penn Badgley) and Vanessa’s (Jessica Szohr) new relationship hits a bump in the road. Matthew Settle also stars. Jean de Segonzac directed the episode written by Lenny Rosenfeld.