Episode list

Serena has gone missing; Chuck and Blair make a promise to each other about their relationship.

Serena hosts a big gala, Blair prepares to debut her new fashion line and Dan must decide if he is willing to sacrifice hisintegrity in order to get his work published.

Feeling the pressure to make her first Waldorf Designs fashion show a success, Blair must rely on help from an unlikely source, but some unexpected scheming causes a scandal on the runway. Serena discovers that befriending Steven's daughter Sage is trickier than she thought, especially when she is forced to put her issues with Blair aside to make Sage happy. Nate publishes Dan's first serialized article causing a stir and producing a serious threat. Meanwhile, Chuck begins to look into the clue that Amira left behind, which may help uncover what Bart is hiding.

Chuck's investigation into his father's dealings leads him to an unlikely event with Manhattan's elite; Serena and Steven decide to reveal their romantic histories.

Eleanor gives Blair an ultimatum; Serena worries about Steven's attitude toward her; Dan publishes another article.

With Ivy's help, Chuck discovers there is evidence incriminating his father and enlists Nate to help retrieve it. Serena volunteersto help Dan, but unexpected emotions arise.

Serena and Dan decide to make amends with those they have wronged. Chuck is close to getting the evidence he needs against his father, but a close ally reveals his plan.

What's Thanksgiving without a side of drama? Serena and Dan throw their first Thanksgiving together, but everyone seems to havetheir own agenda.

After a run-in with Bart, Blair is concerned for Chuck's safety and devises a plan with Serena, Georgina and Sage.

In a fashionable farewell to remember, our favorite Upper East Siders join forces for one last soiree; The identity of Gossip Girl is finally revealed.