The last time we wandered the Upper East Side in our Louboutins, we were left reeling from a major development: Blair Waldorf told Chuck Bass she was giving her final rose to Dan Humphrey. (Chair fans: apologies for rubbing more salt in that wound, but rest easy; even Ed Westwick is convinced Chuck and Blair belong together.)

On April 2, 2012, Gossip Girl returns with Season 5, Episode 18, "Con-Heir," and we've rounded up everything we know about the much-anticipated episode. Here's what to expect as we enter into Season 5's home stretch:

Dan and Blair Have Sex More Than Once
Dair’s first attempt at consummating their epic love story may not live up to Dan’s expectations, as we’ve seen from his lackluster “Wow” response in the promo. However, TVLine reports the two are “in a slight different state of mind the second time they do it." Drunk Dairing? Blame it on the a-a-a-a-alcohol.

Jack Bass Returns!
According to the official synopsis for the episode, Chuck asks good ol' Uncle Jack to come back to NYC to thank him for saving his life, but "the trip doesn't exactly go as planned."

Chuck Bass Is Out for Blood
Chuck is going to do more digging about his time at the hospital, which may or may not lead to “a big reveal” about who really donated the blood that eventually saved his life. On the show, we saw Jack call Diana Payne(Elizabeth Hurley) on the night of Chuck’s accident. Could it have been Diana — and not Jack, like we assumed after Lily told Chuck about the doctor thing — who saved Chuck’s life?

A "Contentious" Feud Is Brewing Between Lily and Ivy
Lily van der Woodsen knows a thing or two about plotting and scheming, and she's going to be putting these skills to vindictive use against Ivy. "Con-Heir" is only the beginning — the battle will grow to pull "almost all of the characters into its orbit" by the end of the season. Adding fuel to the fire, Ivy reportedly finds an ally in William van der Woodsen.