Gossip Girl (2007): Season 1, Episode 10

1 - 10: Hi, Society

Serena's plan on not attending the annual Cotillion Ball is sidetracked when her grandmother CeCe persuades her to attend; Nate sees Blair's new buoyant attitude and entrusts Chuck to find out the reason, in which he tells him that she is having an affair with St. Jude's alumni Carter Baizen, creating drama at the Ball. Blair finds out Chuck did this for personal gain and ends their affair, returning to Nate once more and consummating her love to him during a passionate night. Meanwhile, Jenny attends the ball despite it being on the same night as Alison's art gallery opening.