Gossip Girl (2007): Season 3, Episode 17

3 - 17: Inglourious Bassterds

Chuck and Blair are faced with the most difficult decision they have ever faced as a couple when Jack tells Blair that she has to sleep with him for Chuck to get the hotel back. Blair decides to go do it, then Jack tells her Chuck organized it. Meanwhile, Serena plans a surprise birthday party for Nate, but Jenny does her best to sabotage Serena