The Fringe team returns to the lab, but from the state of the exterior, they know they're probably too late. Guns drawn, they enter, and with their cautious movement, they at first think the place is empty of people, but then Olivia rounds a corner and we only see Nina's glasses in a puddle of blood in front of her chair. While it'd certainly be an effective enough image on its own, it's made ten times more so by Walter rushing forward and kneeling in front of her as he pretty much shatters right there, his jaw hanging open in shock as convulsive sobs wrack his body. Olivia covers Nina with one of the sheets they earlier used to shield Michael from the Observers in the pods, but once she's done that, she too sinks to the ground and her grief may have taken a bit longer to come through, but it's still affecting, if not on a John Noble level. As Peter strokes Olivia's hair, Walter laments the apparent fact that the Observers have Michael, but Peter looks at the security cameras, hoping against hope that there's more to the story than there appears. He activates the feed and sees a replay of Michael touching Nina, and then we see the two of them leave the room before the feed returns to stuff we saw, with Nina taking on Windmark and then making the ultimate sacrifice. The Fringe team realizes that Nina prevented Windmark from reading her thoughts and Olivia cottons on to the idea that maybe Michael is still in the lab.

They start looking around, calling to Michael to come out, but then it maybe occurs to them that A) Nina was a little clever just to hide the boy in some cabinet, and B) maybe the fact that he's not coming out means he can't really come out at the moment, so Olivia goes a little deeper, as it were, and notices one of the Observer pods getting fogged up in one spot. She opens it, flips the shelf on which the dead observer lies over... and there's the boy, in the space underneath, and I'm SO GLAD they shielded him from seeing any dead Observers earlier. She helps him out, whereupon he sees Walter grieving again by Nina's side and, once again, apparently moved by the strength of Walter's emotions, his own bond with Nina or both, he approaches and sheds a tear for the fallen. Knowing what this could mean, Walter smiles through his tears...