Departure (2019)

S4E20 The Princesses and the Frog

Blair finds herself on the brink of achieving her dreams, but Serena risks ruining it all by bringing up Blair’s history. Meanwhile, Charlie strikes up a friendship with Vanessa, who might have ulterior motives. Nate struggles with his feelings as he balances his romance with Raina against a secret he feels compelled to keep for Chuck’s sake.