Below is a promo for Monday's new episode of Gossip Girl, "The Magnificent Archibalds." It's Thanksgiving on the Upper East Side, and that means drama when Blair, her father Harold, Cyrus and Eleanor - all in the same place at the same time.

Meanwhile, Lily tries to play peacemaker between Rufus and Jenny, and Serena tries to open up about her past to Aaron, but Dan ends up doing it for her.

Blair and Chuck both come to Nate's aid when he's forced to confront his father and his past, and Eric discovers a secret that Bart is keeping from Lily.

Here's the promo, with photos and sneak previews to come soon ...

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