14. The Backup Dan

Complete story — includes the ending

Following the wedding, Blair tries to leave for the Dominican Republic, with the help of Dan, to get a divorce from Louis without his consent due to a loophole in the Dominican Republic's law. However, she realizes that she forgot her passport and so asks Dorota for help. Serena, Chuck, and Nate reluctantly team up with Georgina to find Blair, until Georgina gets a tip from one of her sources and leaves. Georgina, as Gossip Girl, then reveals Blair’s location to Louis and Sophia. Nate, Serena, and Chuck eventually find Blair in a hotel room with Dan. Sophia finds Blair and threatens to sell Eleanor's company if Blair chooses not to return, on which Blair reluctantly decides to go back. Elsewhere, Nate has another meeting with the real Charlie Rhodes, who goes by the name of Lola. At the end, it is revealed that neither Chuck nor Serena, who takes the blame, leaked the video of Blair confessing her love for Chuck, and it is implied instead that Dan is the one who sent it in to Gossip Girl. It is revealed that Georgina is simply filling in for Gossip Girl ever since she abandoned the blog after Chuck and Blair's car accident. Title reference: The 2010 film The Back-up Plan.