'Gossip Girl' finale: Chuck Bass and Blair Waldorf together again?

Before "summering" comes to those on the Upper East Side, there are a few last things to resolve on the season finale of "Gossip Girl."

Here's what we learned on Monday's (May 14) episode.

[Spoiler Alert]

Blair vs. Serena: Serena (Blake Lively) thoughtlessly and perhaps more than a little vindictively abducted Blair's (Leighton Meester) diary. So when Gossip Girl reclaims the computer (with the diary on it), she has a treasure trove of Upper East Side dirt to make use of. This sets off a chain of events that immediately pits an understandably upset Blair against a scheming Serena. But the real loser might just turn out to be Dan (Penn Badgley). This brings us to our next point...

Dan vs. Chuck: The two foes are still battling it out for Blair's heart. Things go more than slightly askew for Dan as his worst fears about Blair are manipulated and realized. Chuck (Ed Westwick), on the other hand, is presented with a golden opportunity to reclaim what was once his. The only question is how will he proceed and what's his end game?

Bart's resurrection: Now that Bart (Robert John Burke) is back, it's a bit of a legal quandary for Lily. It appears that since he's not really dead, their marriage isn't really over. So she needs to choose between rehabilitating her troubled relationship with Rufus (Matthew Settle) or trying again with Bart. Lily (Kelly Rutherford) makes a surprising choice when she picks Mr. Bass. But there's always another side to Bart conniving in the background. How long will it take until that ultimately emerges?

And then there's poor Nate (Chace Crawford). Just when he thinks he's found a true love in Lola (Ella Rae Peck), she gets a better offer and chooses to leave the Upper East Side for good.

Until next season...

Uh oh. Uh oh.