Diana has an exciting prospect for Nate. Serena forces Charlie to decide which world she wants to embrace. Dan seeks out Chuck's help to stop the publication of his book.

Blair makes all of her former minions compete to secure the coveted bridesmaid spots in her upcoming royal wedding. Nate is tired of keeping his relationship with Diana a secret.

Serena is hard at work planning a dream bridal shower for Blair. Chuck and Dan decide to distract themselves from the fact that they didn't make the invite list.

Lily throws Charlie a party to officially introduce her to New York society. Dan decides it may be time to tell Blair the truth about his feelings for her.

Blair reveals to Serena what really happened in the aftermath of her tragic car accident. Nate discovers information about the accident that suggests possible foul play.

Blair must make a difficult decision about her future, the consequences of which could hurt those she loves most. Serena takes the blame in order to protect someone she loves.

Dan feels honoured when he learns that a comedy troupe is performing excerpts from his book. Blair tries to prove Serena's suspicions wrong in order to save their friendship.

Blair thinks a potential loophole may have been found in her pre-nuptial agreement. Meanwhile, a family crisis brings William van der Woodsen back to the Upper East Side.

Chuck invites Jack to town to thank him for saving his life, but finds the trip doesn't go exactly as planned. Blair and Dan attempt to consummate their new relationship.

Serena sets out to make a reluctant Lola the next It Girl of the Upper East Side. Meanwhile, Chuck reaches out to Blair for advice about his past.

Blair enlists Serena to be her stand-in at an important meeting. Meanwhile, Ivy and Lola team up to help Chuck with a personal vendetta.

Gossip Girl goes after Blair as never before. She must make a choice between the two men in her life - will it be Chuck or will it be Dan?

At Diana's request, Nate must decide whether to cross moral lines. Dan figures out who is publishing his book and seeks help to stop it, but he still ends up in the spotlight.

Blair and Louis find themselves in a power struggle with Louis' family. Serena is in the awkward position of choosing between her new job and her relationship with Dan.

The Upper East Siders attend a performance of a provocative theatre experience, which means masks, anonymity and some surprising romantic twists by the end of the evening.

Nate takes on a new role at the Spectator, but his first big story turns out to be about someone he knows all too well. Blair turns to an unlikely person for help.

Blair prepares to celebrate her upcoming royal wedding with a bachelorette party, but others scheme behind her back to make this a night to remember.

Blair feels her Upper East Side status might be slipping away and devises a plan to assure that doesn't happen. Nate digs into Diana's past and is surprised by what he discovers.

Chuck, Nate, Blair, Serena and Lola team up to uncover what they think is an explosive secret between Diana and Jack. Dan is offered a prestigious fellowship in Rome.

After much deliberation, Dan decides to reveal his book to his friends. Meanwhile, Blair and Louis enter crisis status and Diana uses incriminating information to her advantage.