3. Poison Ivy

As the Upper East Side teens from Constance Billard and St. Jude's prepare for a much-anticipated visit from the Ivy League representatives, Blair and Chuck uncover a scandalous secret about Serena that may not remain a secret much longer. Dan has his heart and future set on the coveted usher position for the Dartmouth rep, only to be beaten out by Nate, who has no interest in the school despite pressure from his controlling father, The Captain. Meanwhile, Jenny bonds with Serena's younger brother, Eric, and Rufus must swallow his pride and ask Lily for a favor to help his son, Dan, despite their complicated history. Title reference: The 1992 film of the same name.