Chuck offers to throw a wedding for a very pregnant Dorota who insists that she and Vanya have a traditional wedding before her parents arrive from Poland and find their daughter pregnant and without a husband. Dorota asks Blair and Chuck to be part of the ceremony and walk her down the aisle. Serena tells Nate she is having breakfast with the Humphreys when in reality she's secretly meeting up with Carter Baizen. Rufus discovers that Lily has been lying to him about her whereabouts.
Season 3 Episode 18 of Gossip Girl resulted in a 0.00 rating in the 18-49 demographic.
 s03e01 - Reversals of Fortune
        s03e01 - Reversals of Fortune
          
        
      
     s03e02 - The Freshman
        s03e02 - The Freshman
          
        
      
     s03e03 - The Lost Boy
        s03e03 - The Lost Boy
          
        
      
     s03e04 - Dan De Fleurette
        s03e04 - Dan De Fleurette
          
        
      
     s03e05 - Rufus Getting Married
        s03e05 - Rufus Getting Married
          
        
      
     s03e06 - Enough About Eve
        s03e06 - Enough About Eve
          
        
      
     s03e07 - How to Succeed in Bassness
        s03e07 - How to Succeed in Bassness
          
        
      
     s03e08 - The Grandfather: Part II
        s03e08 - The Grandfather: Part II
          
        
      
     s03e09 - They Shoot Humphreys, Don't They?
        s03e09 - They Shoot Humphreys, Don't They?
          
        
      
     s03e10 - The Last Days of Disco Stick
        s03e10 - The Last Days of Disco Stick
          
        
      
     s03e11 - The Treasure of Serena Madre
        s03e11 - The Treasure of Serena Madre
          
        
      
     s03e12 - The Debarted
        s03e12 - The Debarted
          
        
      
     s03e13 - The Hurt Locket
        s03e13 - The Hurt Locket
          
        
      
     s03e14 - The Lady Vanished
        s03e14 - The Lady Vanished
          
        
      
     s03e15 - The Sixteen Year Old Virgin
        s03e15 - The Sixteen Year Old Virgin
          
        
      
     s03e16 - The Empire Strikes Jack
        s03e16 - The Empire Strikes Jack
          
        
      
     s03e17 - Inglourious Bassterds
        s03e17 - Inglourious Bassterds
          
        
      
     s03e18 - The Unblairable Lightness of Being
        s03e18 - The Unblairable Lightness of Being
          
        
      
     s03e19 - Dr. Estrangeloved
        s03e19 - Dr. Estrangeloved
          
        
      
     s03e20 - It's a Dad, Dad, Dad, Dad World
        s03e20 - It's a Dad, Dad, Dad, Dad World
          
        
      
     s03e21 - Ex-Husbands and Wives
        s03e21 - Ex-Husbands and Wives
          
        
      
     s03e22 - Last Tango, Then Paris
        s03e22 - Last Tango, Then Paris
          
        
      
    The Upper East Side is thrown for a loop when Gossip Girl reports that Serena van der Woodsen, Manhattan's most notorious party girl, has arrived back in town after a mysterious absence where no one knows where she was or why she left. Not even Serena's closest friend, Blair Waldorf, knew her whereabouts and is shocked to learn Serena has returned. However, their once close friendship is complicated upon Serena's return, strained now that Serena is the center of attention and Blair has been cast from the limelight, and the revelation that Serena had a fling with Blair's boyfriend Nate Archibald.
Also ruling the Upper East Side is Chuck Bass, son of the wealthy and powerful Bart Bass and a friend of Nate's since childhood. Chuck leads a reckless life, which often leads Nate down a similar path of darkness and destruction. 
Lastly there's Dan Humphrey and his sister Jenny, middle-class kids on the outside looking in on the exclusive wealthy clique. Dan and Jenny are forced to attend the school by their former rock star father, Rufus, who has a tumultuous past with Serena's mother Lily van der Woodsen, a socialite with a secret past as a groupie. However, Dan and Serena's worlds collide following a chance meeting where Dan quickly finds himself dating the girl of his dreams. The closer they become, the more Dan learns about the real Serena and how different she is from the world in which she lives.
With all of the ever-changing drama in the lives of the teenagers and adults alike, the ever-present Gossip Girl is always around to keep up on the complex and intriguing world.