Title: Poison Ivy
Air Date: October 3, 2007 at 12:00 AM PDT
The Constance Billard–St. Jude's Ivy Week is here. As representatives arrive from each of the Ivy League schools, the students vie for coveted usher positions. Although Dan desperately wants the usher job with the Dartmouth rep, Nate is given the honor—despite an utter lack of interest in his father's alma mater. After an all-out fight with Serena, Blair tracks down a shocking but juicy secret about her former BFF and plots to drop the bomb at the worst possible moment. Only problem? The secret isn't true! Meanwhile, Jenny gets close to Serena's younger brother, Eric, and Rufus asks Lily for a favor.