Gossip Girl Season 2 Episode 21

Serena returns from her week-long trip to Spain with Poppy and Gabriel. But Serena becomes worried that during the hard partying in the country, she thinks she may have gotten married to Gabriel by accident. Meanwhile, Blair makes a secret deal with Nate's grandfather, William, to influence Nate to attend Yale when he decides to defy his grandfather and attend Columbia University in New York City instead.