Dan Ziskie

In the Season Five finale, the girls head to the Hamptons for the wedding of a flamboyant lounge singer. Meanwhile, Charlotte's clandestine affair with her lawyer takes an interesting turn, Miranda and Steve blur the line between friends and lovers, and Carrie finds a potential suitor in a motorcycle-riding colleague.

Reese and Finch call on a former POI and Zoe to help when they learn that the latest POI may have been pushed to his breaking point by a string of bad luck.

Devastated by the state of her relationship with Nate and still dealing with the guilt from a recent indiscretion, Blair puts on a happy face for her 17th birthday party and attempts to hide the truth from her friends. Hoping to ease the tension between Serena and Vanessa (recurring guest star JESSICA SZOHR), Dan takes Vanessa to Blair's party so the girls can have some bonding time, but this only ends up making Serena more uncomfortable. Meanwhile, Jenny brings her mom (recurring guest star SUSAN MISNER) home for a surprise visit, but Rufus may not be ready to forgive and forget. And Nate's parents ask him to make a huge sacrifice in order to salvage the business of his father, who faces charges of embezzlement and fraud.

Chuck, Serena, Blair, Dan, Jenny and Eric (recurring guest star CONNOR PAOLO) find themselves faced with a crisis when a member of one of their families is hospitalized. Meanwhile, Nate attempts to help his parents, the Captain (recurring guest star SAM ROBARDS) and Anne (recurring guest star FRANCIE SWIFT), put their complicated past behind them and reconcile. Recurring guest star KATIE CASSIDY appears as Juliet.

An international incident prompts the staff to rewrite the president's address on the eve of his inauguration.