Got to say, I found it a little unbelievable that Joan's hubby wasn't more angry than he appeared to be about having a vase broken over his head. I would have expected that character to beat the crap out of her.
John Hamm was wonderful in the big scene with JJ. The way his hand thudded to the desk . . . The way he dropped that cigarette . . . Exceedingly well done.
In terms of the story, the revelation could be the best thing that could have happened to that marriage, by the way.