Gossip Girl (2007): Season 4, Episode 2

4 - 2: Double Identity

Serena and Blair run into a different Chuck in Paris, and is reluctant to return to New York with Eva. Back in New York, Juliet suggests to Nate that tricking Vanessa to be with Dan might be the right thing to remove Dan from the Dan-Serena-Nate love triangle. Rufus learns that Dan isn't Milo's father after he checks Georgina and Milo's blood test. Serena convinces Blair to talk Chuck into returning to Manhattan while Dan and Nate prepare to face Serena.