My understanding of the episode is that it was an accident. The daughter, Diana, was cleaning out her mother's place, they argued and a stack of books that were bound together fell on Diana's head, causing a subdural hematoma that eventually killed her. The mother had hoarding "blindness" and so her daughter's body just sort of disappeared, literally and figuratively, into the mess. My mom is a hoarder -- not nearly as bad as this woman, but bad enough that it can create problems -- so I know a little bit about this situation. I think they did a good job of explaining the triggers and showing the consequences . . . though of course these were pretty extreme consequences. I loved Sara's "talk to the hand" salute to Ray as she walked out the door. I also felt that the conflict between Sara and Nick was quite believable, especially for two people who know one another so well. A newbie probably wouldn't have had the guts to call Nick an ass, but Sara did. Both of them had dug their heels in with their respective theories, and neither was going to budge. Hence, the conflict. It happens. I think the ongoing references to Grissom are a sort of "gone but not forgotten" tribute to the character. I like the fact that we're hearing him mentioned so much this season. He left as he wished, with no cake in the breakroom, but of course his influence on the remaining characters continues to manifest itself in their experiences because of all that they learned from him. In a recent episode, didn't Sara say something to Nick about "He hates it when you call him that"? (I forget now what that was in reference to.) So it sounds like Grissom is still there in her life, but just not there in the workplace. Even though he's present in Sara's life, the references for all the others are going to be in past tense. It's a conundrum for the writers, but I think they're doing a pretty good job with it. I'm really enjoying this season. Ray's character felt more "settled in" to me somehow this time around. Greg was more at the forefront again. And, as with last week, all the main characters' behaviors felt believably rooted in their history with one another. This episode gets an "A" from me!