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Jenny returns to Gossip Girl to meet Tim Gunn, even though Blair made it clear she's no longer welcome in NYC. Serena discovers a secret about Colin.
A Gossip Girl blast targets Serena. Blair decides to take a class with a powerful businesswoman, Martha, while a mystery student plans to thwart Blair by becoming Martha's assistant.
Nate suspects that Juliet is keeping a big secret from him and decides to confront her. Blair schemes to undermine Chuck's newfound happiness.
"The Undergraduates" brings us back to the Upper East Side. Blair attempts to attain elite social status again, while Serena begins to grow suspicious of Juliet.
The second episode of the fourth season also takes place in Paris. Chuck's relationship with Eva is explained further.
Season Four of Gossip Girl officially kicks off in Paris, where Blair and Serena spent the summer, and the mystery of Chuck Bass' condition and whereabouts lingers.
Blair must decide whether to meet Chuck or risk losing their future together. A Gossip Girl gossip bomb involving Dan causes major problems for Serena and Nate.
Things get tense between Rufus and Will. Serena chooses sides. Jenny shares info with Will that will destroy Lily. Chuck makes a grand gesture to Blair.
Serena's father is featured prominently in this episode. How will Rufus react? We'll soon find out.
Serena's father makes his return in this episode. Chuck attempts to stop Blair from moving on, and Dan deals with some upsetting news.