THE JEWEL OF DENIAL

Serena and Charlie return to New York. Meanwhile, Dan goes to his old mentor Noah Shapiro for advice on how to handle his book's release and Chuck tries to break through his emotional block physically. Unknowingly, Nate is persuaded by Diana to cross moral lines. A reluctant Blair decides she doesn't want to learn who the father of her unborn child is but Dan has different plans. (Gossip Girl Wiki)