I knew that hammer was going to show up somewhere, because movie people are too dumb to dispose of evidence. So, my money is still on Sylvia or Gramps as the culprit. I don't think Henry did it - I think he's covering for someone or someone planted it. As mentioned upthread, it's interesting that the last place Henry practiced his violin was at Grandpa's. Although another twist could be that Grandpa is a flawed but decent guy who sometimes throws his weight around. Since we see him sitting in art galleries all the time, I couldn't help but wonder if he was a secret patron of Elena's
Stuff I hope doesn't just get dropped:
Seriously, what the HELL happened to the 500,000 that was loaned to Jonathan? And then he needs another 2mil from Franklin for bail, and no one asks about this?
What was Jonathan's ruse about the faux conference about? Why was he setting that up well before the murder took place? I like the theory that Jonathan was actually planning to run away with Elena and the baby, and wanted the money for a new start elsewhere.
I was convinced there was a hidden relationship between Grace and Elena, but that has not been revealed yet, so maybe not.
I hope they explain how the culprit left the scene undetected if they were undoubtably splattered with blood and brain matter.
Grace is clearly nuts, and I think the MIL's video might be a red-herring. Not sure if Jonathan is a full-blown sociopath or just an asshole who grew up with cold parents. Nicole's frozen face was bothering much more this episode than any of the others - from certain angles, she was looking more and more like the Joker. She really needs to cut that shit out.
It's too bad that something with such a tantalizing premise devolved into a collection of cardboard cutout suspects - essentially this is an Upper West-Side version of Clue. Now I'm off to Pop Sugar to look at the archive of Nicole's coats!