<P> Upon its initial airing, the episode was viewed by 0.78 million Americans and garnered a 0.4 / 1 Nielsen rating / share in the 18--49 demographic, registering as the series' least - watched premiere . Despite the low ratings, the premiere received mixed to positive reviews from television critics praising the writing, except the development of Rufus and Ivy's storyline, which was criticized . </P> <P> In the fifth season finale, Blair Waldorf (Leighton Meester) decides she wants to have a relationship with Chuck Bass (Ed Westwick) and she meets him in a casino of Monte Carlo . Serena van der Woodsen (Blake Lively) leaves New York City after being rejected by Blair and Dan Humphrey (Penn Badgley) and does drugs with a stranger in a train . Dan decides to expose the real world of the Upper East Side in his new book and teams up with Georgina Sparks (Michelle Trachtenberg) while Nate Archibald (Chace Crawford) tries to unmask Gossip Girl . Lily Bass (Kelly Rutherford) annuls her marriage to Rufus Humphrey (Matthew Settle) in order to get back with Bart Bass (Robert John Burke) who recently resurfaced . Ivy Dickens (Kaylee DeFer) plans to take down Lily with the help of Lola Rhodes (Ella Rae Peck). "Gone Maybe Gone" picks up right after those events; Blair and Chuck have sex in a room of the casino's hotel, Serena is seen unconscious in the train, Dan is in Italy with Georgina who tries to make him write, and Nate prints pictures of a video featuring the masked Gossip Girl . </P> <P> Four months later, Lily and Bart come back from their holidays in the Hamptons during which they renewed their vows . It also revealed that Lily has not been in touch with her daughter, Serena, for the whole summer . Blair is running her mother's clothing company in Paris, Dan continues the writing of his book with Georgina, Nate is working at The Spectator, and Chuck is in Dubai trying to find what his father was doing there, before he faked his death and reappeared months ago, with the help of his father's translator, Amira (Andrea Gabriel). When the group receives the news that Serena has gone missing, Blair, Dan, Georgina and Chuck fly back to New York to find her . Ivy has moved in with Rufus letting him believe that she has no money anymore and no place to live to manipulate him and destroy Lily . </P> <P> Having no clue as where Serena might be, Nate sends Gossip Girl the video he had of her obtaining in exchange the location where Serena is . The group goes at the location and finds Serena who goes by the name of Sabrina and has a new boyfriend, Steven (Barry Watson). As it looks like a wedding will take place and that Serena is the one who is getting married, Blair and Georgina tell the truth about who Serena is, ruining the wedding of two men; Serena was only a maid of honor . Blair apologizes to Serena for the mean words she said to her months ago but she responds that she wants a fresh start with Steven . </P>

When does serena go missing in gossip girl
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