We've already dropped a mega-Gossip Girl spoiler (or at least topic for debate) this afternoon. Now here's a promo of next Monday's all-new episode of the CW guilty pleasure.

When we last left Blair, she sought revenge. Well, it looks as if Rachel Carr and Gossip Girl herself are at the center of controversy in this new episode, the 17th of Season Two.

It's hilarious title? "Carrnal Knowledge." But will Blair's quest to bring Rachel down backfire? And would Dan actually hook up with his girlfriend's mentor, as this promo implies?

Check out the preview for "Carrnal Knowledge" below and see what you think:

[video url="http://www.gossipgirlinsider.com/videos/carrnal-knowledge-promo/" title="Carrnal Knowledge Promo"] [/video]

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.