Gossip Girl aired its third straight lackluster episode Monday as the CW series limps toward its December 17 finish line. Will things finally pick up after the last five minutes of "Portrait of a Lady Alexander"?

One can only hope, with just six episodes of the series to go. Next week, on the Upper East Side ...

After Eleanor gives Blair an ultimatum, B is determined to remedy Waldorf Designs’ problems by making a splash at the upcoming Cotillion, but a shocking revelation at the ball affects everyone.
Serena is worried about Steven’s attitude toward her, then learns the surprising reason why.
Chuck finds an unlikely ally as he tries to drive a wedge between Bart and Lily’s relationship.
Dan publishes another article, but the effect is just the opposite of what he was hoping for.

Check out the CW promo and photos from "Monstrous Ball" below if you haven't seen them:

Click to enlarge the episode photo gallery: