Aaron Tveit

Mike Kresteva takes his case against Reddick, Boseman & Kolstad to a grand jury, but the firm devises a grand jury strategy of their own to hamper his efforts; Colin finds himself in an awkward position in court.

Alicia worries that she will break confidentiality when the Treasury Department forces her to report on her latest client, while Peter reluctantly digs into Will's past transgressions.

Diane is encouraged to do something after meeting the leader of a female resistance group; Maia and Blum's plan for a plea deal goes awry; Lucca receives a surprising new divorce referral.

Olivia (recurring guest star HILARY DUFF) says something she regrets during an appearance on a talk show with host JIMMY FALLON (guest starring as himself) and tries to keep Dan from finding out. With election day around the corner, Nate suspects his grandfather (recurring guest star JAMES NAUGHTON) will stop at nothing to get Tripp (recurring guest star AARON TVEIT) elected to Congress. In the midst of another feud with Serena, Blair befriends a new It girl. In an effort to make Serena jealous, Blair takes her new friend to an election night party at Chuck's hotel.

How about an extra helping of drama this holiday season? It just wouldn't be Thanksgiving on the Upper East Side without it. Blair suspects her mom (recurring guest star MARGARET COLIN) has been keeping a big secret from her, but it turns out to be something else entirely. Vanessa is supposed to spend Thanksgiving with her parents, but has a fight with her mom (recurring guest star GINA TORRES) and shows up on Dan's doorstep. Meanwhile, Rufus learns that Lily has been lying to him about her mother, Cece (recurring guest star CAROLINE LAGERFELT), and Chuck tells Nate that he has some potentially damaging information about one of their friends. Plus, Jenny learns that Eric (recurring guest star CONNOR PAOLO) was behind her very public embarrassment at Cotillion and can't pass up a chance to get even. And Serena is put in a very awkward position when her mother invites Tripp (recurring guest star AARON TVEIT) and Maureen (recurring guest star HOLLEY FAIN) to join them for Thanksgiving dinner.