Gossip Girl (2007): Season 4, Episode 3

4 - 3: The Undergraduates

Juliet prevents Serena from joining the Hamilton House sorority. Serena and Blair find a way to expose Juliet's sabotaging plans. Georgina finally comes clean to Dan about Milo. Chuck is afraid of introducing Eva to Lily and Rufus, since she doesn't know of all the things he has done in the past.