In a season finale rife with cliffhangers, Gossip Girl livens things up at graduation by sending out a shocking email blast during the ceremony.

To prove her independence, Serena refuses to leave jail with her mother or her grandmother. Rufus is furious with Lily for having Serena arrested.

Blair pressures Georgina to help her in a scheme. Nate and Chuck's rivalry over Blair comes to a head. Lily hatches a secret plan to help Rufus.

Georgina returns. Chuck and Nate are at a crossroads in their friendship==a result of their mutual interest in Blair.

Serena returns from her trip to Spain with Poppy and Gabriel. Blair makes a secret deal with Nate's grandfather. Dan gets a job.

Serena throws Jenny a party for her 16th birthday, but things get out of control when Poppy Lifton turns the small gathering into a huge social event.

Devastated by recent plot twist in her life, Blair turns her back on her predictable existence in favor of a wilder lifestyle.

The seniors put on a production of "The Age of Innocence." Chuck enlists help from an unlikely source--his nemesis, Carter Baizen.

Blair comes up with a plan to get revenge on her teacher. Chuck wakes up in a hotel and tries to piece together what happened the night before.

Which students will be accepted to Yale University? Chuck pairs up with an unlikely ally in his war with Jack over Bass industries.

Bart's will is read and everyone learns the fate of the Bass empire. Plus, Dan discovers the secret between Rufus and Lily.

Chuck's uncle, Jack Bass, arrives on the scene. Meanwhile, Jenny returns to school and takes on the mean girls.

A sudden and tragic event impacts the lives of everyone on the Upper East Side, especially Chuck and the van der Woodsens.

At the annual Snowflake Ball, Blair and Chuck bet they can find ideal dates for each other. Aaron's ex-girlfriend shows interest in Dan.

Blair's favorite Thanksgiving traditions are ruined by her mother's new boyfriend. Serena doesn't tell Aaron about her past, but Dan does .

Dan tries to get close to Bart Bass to possibly write an expose, but things get heated when Chuck finds out.

Serena realizes Aaron has kept a secret from her. Jenny and Agnes plan a guerrilla fashion show. Blair baby-sits the daughter of a Yale donor.

Jenny befriends a model, and is encouraged to explore her wild side. Serena is attracted to an artist, Aaron Rose.

Blair seeks revenge by enticing Chuck to seduce Vanessa. Serena rebels at a party of Lily's. Dan and Jenny find out a secret Nate has been hiding.

After a fight, Serena wants to get even with Blair (who dreams of attending Yale) and accepts an invitation to visit. Chuck is kidnapped.

Blair sabotages her mother's show at Fashion Week. Dan starts hanging out with Chuck, and learns that a walk on the dark side always has risks.

When Serena notices Dan's been cozying up to the new girl in school, ever- loyal Blair and her minions decide to sabotage Amanda's budding new romance.

Serena and Dan must deal with their problems while trapped in an elevator. Blair and Chuck question the lack of passion in their relationships

Blair is thrilled to be dating royalty, but a scheming Chuck has other plans for her. Serena and Dan agree to keep their recent hookups a secret.

Gossip Girl head to the Hamptons as summer comes to a close. Serena and Nate fake a relationship as a cover for Nate's affair with a married woman.