Gossip Girl Sneak Peek: Chuck’s ‘Seduce and Destroy’ Mission

10/20/2008 AT 12:00 AM EDT

In Monday's episode of Gossip Girl, steely Vanessa uses a compromising picture of Marcus and Catherine to blackmail Blair into helping her with a charity of her choice. But Blair says, "Charity is for diseases and endangered species," and she's not going to be convinced otherwise. Of course, she might need help from a certain someone who is willing and able to play dirty. So, she sends Chuck on a mission: "seduce and destroy."

Watch two more clips below.

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