Gossip Girl

Nate reconnects unexpectedly with Diana, who offers him an exciting opportunity. Blair's future sister-in-law, Beatrice, arrives from Monaco.

At Diana's request, Nate must decide whether to cross moral lines. Chuck helps Dan come to terms with his fate. A Jenny Packham fashion show is featured.

After much thought, Dan decides to gather his friends and family to reveal the truth about his book in the hope that they will support him at his book party.

Serena must choose between her new job and her relationship with Dan. Plus, Diana expects Nate to help out when an unexpected surprise delays her launch.

Blair makes her former minions and Charlie compete for the coveted bridesmaid spots in her upcoming royal wedding. Nate uses Charlie to make Diana jealous.

Attending a performance of Punchdrunk's provocative theater experience "Sleep No More" can only mean masks, anonymity and some surprising romantic twists. But involving who?

Serena plans a dream bridal shower for Blair, but Chuck and Dan don't make the guest list. Nate and Serena make a discovery in Diana's war against Gossip Girl.

Lily, Charlie and Serena eagerly anticipate the Studio 54 party thrown in CeCe's honor. Nate takes on a new role at the Spectator.

Lily throws Charlie a party to officially introduce her to New York society. Meanwhile, Charlie's ex-boyfriend, Max, throws a wrench into her future plans.

Through a series of emotional flashbacks, Blair reveals to Serena what really happened in the aftermath of her tragic car accident with Chuck.

Blair prepares for her bachelorette party. Nate joins forces with a surprising ally to gather evidence about Chuck and Blair's car accident. Serena and Dan pretend to date again.

In the 100th episode, as Blair is about to marry Prince Louis, the return of Georgina Sparks might make the royal affair a royal disaster.

Blair struggles to decide about her future and Serena takes the blame for an incident with Gossip Girl in order to protect someone she loves.

It's Valentine's Day on the Upper East Side. Georgina, intent on stirring up drama, decides to crash Nate's Valentine's Day party. ST. VINCENT performs.

Dan's book is showcased by comedy troupe Upright Citizens Brigade, Blair tries to prove Serena's suspicions wrong and Ivy ends up on a collision course with the van der Woodsens.

Chuck and Georgina partner up in a scheme, with an unpredictable outcome. A family crisis brings William van der Woodsen to town.

Chuck invites Jack to town, Blair and Dan attempt to consummate their new relationship and Ivy finds an unlikely ally in William.

Serena tries to make a reluctant Lola the next It Girl of the Upper East Side, starting with modeling at a Kiki de Montparnasse show.

To celebrate being a couple, Blair and Dan host a glamorous British-themed Salon. Serena and Diana face off.

Lily has a family gathering with William, Carol and Lola. Nate digs into Diana's past. Blair's status worries her.

Chuck, Nate, Blair, Serena and Lola team up to uncover what they think is an explosive secret between Diana and Jack.

Serena poses as Blair at an important meeting. Ivy and Lola team up to help Chuck. Nate makes a decision about the future and Diana.

In the season finale, when Gossip Girl goes after Blair, Serena admits she may have played an important role in Blair's latest nightmare. Plus, will Blair choose Chuck or Dan?