My GSR reaction (FINALLY) to EE:
The end scene: It's Sara and Grissom. They're standing by each other, and he's already completely invading her personal space. She has her arms pulled around her, her jacket over her arms. It's a defensive stance, and the last time we saw it, she was protecting herself from Grissom as he said goodbye to her in the locker room. Tonight, he standing by her side, right there, helping her fend off the monsters as much as he can. She watches the images on the screen. After functioning on pure adrenaline for so long, pushing herself so hard to find the answers, she finally lets it come down.
The tears fall down her face, and she admits to him that she held the hand of the killer. She looks to him as a million emotions wash over his face. There's a bit of shock. There's the temptation to scold her, to tell her she shouldn't have done that. There's also compassion. As she turns away from him, compassion for his lady love takes over as the primary emotion. In the past, he would have given her a lecture, would have told her that she was chasing rabbits, would have cautioned her on getting too close to the victim and spending all her time in hospital rooms... He would have talked to her about winning and losing, and given her a riddle to ponder. Tonight, he has no words. There's nothing he can say.
Her telling him outright meant she wanted him to know. She wasn't trying to hide anything and keep him out of the loop. She was telling him in that moment why she had been so terribly affected by the whole thing, why she was standing there crying. She told him without him having to ask. She opened herself up to his opinion, to his ridicule, to whatever she thought he might offer. But, he only offered comfort. He reached up, wiping her tear away awkwardly with his left hand while his right arm wound around her back, letting her know he was there. She looks at him, her eyes searching his, reaching out. He looks down, the squints at her, realizing this isn't the best place to give her the comfort she needs. With a glance towards the door, he tells her they should go. She nods, following his lead, but his arm never moves from around her.
It's consistent for Grissom to have an arm around her. It really is. If you go back to Strip Strangler, as they walked away from the decoy operation, he has his arm around her, protectively. If you listen, you can actually hear the sound of his hand touching her back as he leads her away. In Blood Drops, he walks arm in arm with her across the busy street. Then, puts an arm around her to steer her clear of the sprinkler they pass so she won't get wet. It's instictual for him to put an arm around her when he's worried, concerned, and not paying attention to his own fears about doing so. When they walk out, he wants her to know he's there for her. As the camera smashes to black, she turns towards him. She feels the love that he's offering her, and it's incredibly sweet.