Monday marks the final Gossip Girl episode until mid-April, and it looks as though the storyline everyone is talking about comes to a head in "Empire of the Son."

What happened between when the credits rolled in "While You Weren't Sleeping" and when we pick up February 28? Was there a kiss? Was there more than that?

One thing's for sure. The relationship no one could have envisioned a few years, even a few months ago will be exposed, and there will be a Dair cliffhanger:

Follow the jump for a sneak preview clip from the episode in which Blair is called out for sneaking around with Dan. It's no surprise who figured it out first ...

How do you see this playing out? Is there hope for Dan and Blair? Do you want there to be? How will Chuck react? Leave a comment and discuss below.

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