Gossip Girl [OV]

As season four kicks off in Paris, Blair spots a mysterious Chuck Bass in the City of Lights ... with a beautiful new woman (recurring guest star CLEMENCE POESY). Oh mon dieu!

Blair is pursued by a handsome young man she suspects is part of Monaco's royal family. Chuck adjusts to a fresh start in Paris with a mysterious new woman, Eva (CLEMENCE POESY).

It's back to the Upper East Side! Blair has her first day at Columbia University and Serena begins to suspect Juliet (KATIE CASSIDY) may be intentionally sabotaging Serena's life.

Nate suspects that Juliet (KATIE CASSIDY) is keeping a secret from him and decides to confront her. Blair schemes to undermine Chuck's newfound happiness. Dan is confused.

A Gossip Girl blast starts a damaging rumor about Serena. Blair decides to take a class with a powerful businesswoman (guest star MARLYNE BARRETT), but her plans are thwarted.

Although Blair made it clear that Jenny was not welcome in Manhattan after what happened with Chuck, Jenny is tempted by the chance to meet TIM GUNN (Project Runway).

Blair is caught off-guard by a surprise guest at her birthday party. Having had enough of Chuck and Blair's games, Serena and Nate decide to plan an intervention. ROBYN performs.

Chuck and Blair decide it's in both of their best interests to put the past behind them and end their vindictive games. Nate confronts Juliet (KATIE CASSIDY).

Chuck throws a "Saints and Sinners" masquerade party. Meanwhile, Blair sets her sights on becoming the new face of Anne Archibald's (FRANCIE SWIFT) foundation for girls.

Chuck, Serena, Blair, Dan, Jenny and Eric (CONNOR PAOLO) are faced with a crisis when a member of one of their families is hospitalized. Nate tries to help his parents reconcile.

Blair and Dan join forces to track down Juliet (KATIE CASSIDY), who is MIA. Chuck suspects Lily isn't telling him the truth. Recurring guest star KEVIN ZEGERS appears as Damien.

Russell Thorpe (MICHAEL BOATMAN), a former associate of Chuck's father, and his daughter, Raina (TIKA SUMPTER), return to Manhattan with some unfinished business.

It's Blair versus Dan, when both land an internship at W magazine. Chuck may have met his match with Russell Thorpe (MICHAEL BOATMAN) and his daughter (TIKA SUMPTER) back in town.

Blair enlists Nate's help to win over her high-strung boss (CAITLIN FITZGERALD) at W magazine. Damien (KEVIN ZEGERS) stirs up more drama. FLORENCE AND THE MACHINE performs.

Chuck makes one last-ditch effort to save Bass Industries. Blair is given a challenging assignment at W magazine, and Serena struggles with her feelings for Ben (DAVID CALL).

At Eric's (recurring guest star CONNOR PAOLO) 18th birthday celebration, there is plenty of drama to go around. Serena is forced to choose between her family and Ben (DAVID CALL).

Ben's (DAVID CALL) mother (MARSHA DIETLEIN BENNETT) comes to town, forcing issues to the surface between Ben and Serena. BILLY BALDWIN appears as William van der Woodsen.

Lily's family offers support and takes part in a Taschen photo shoot on "modern royalty." BILLY BALDWIN, CAROLINE LAGERFELT, SHEILA KELLEY, KAYLEE DeFER guest star.

Serena enlists Charlie (KAYLEE DeFER) to go undercoverto determine why Dan and Blair are spending so much time together. Raina (TIKA SUMPTER) decides to search for her mother.

Blair's dreams appear to be coming true, but Serena threatens to jeopardize it all. Nate is torn between his relationship with Raina (TIKA SUMPTER) and loyalty to Chuck.

En route to "happily ever after," Blair finds herself torn between the men in her life. Jack Bass (DESMOND HARRINGTON) returns to the Upper East Side. KAYLEE DeFER guest stars.

In the explosive season finale, Georgina Sparks (MICHELLE TRACHTENBERG) returns, AIRBORNE TOXIC EVENT perform and CECILY VON ZIEGESAR appears. Plus, a few very juicy cliffhangers.