And then Etta loses Walter after she provides covering fire for him to get past as well. The fact that she's on her own doesn't bode well and it's not long before Etta -- cautiously inching her way through an empty warehouse -- is joined by Windmark, who apparates behind her, cracks her across the jaw, and throws her through a window. She drops her gun, but she -- bruised and bloodied -- can barely crawl over the broken glass to get it. Windmark puts his foot on it and stands there, staring at her.
Peter and Olivia find Walter hiding in some sort of steel strongbox. I'm sure they're happy to see him, but Etta not being with him is cause for concern (although you could argue that anyone would do better in a firefight solo rather than having to worry about Walter).
Etta is, at that moment, being held up against a pillar by the throat by Windmark (one-handed, no less). He's too strong for her to break his grasp, giving him plenty of time to see her necklace and make the brilliant deduction that Peter bought it for her. He asks her why, and starts reading her thoughts. We see images of her as a child, blowing the seeds off a dandelion. We see Peter holding out his arms to her. "Love," says Windmark, in one of the hokiest science-fiction clichés I can think of. Now he knows why humans cry, is that it?
Meanwhile, Etta has managed to pull out a little dagger that tries to jam into Windmark's neck, but he blocks it and squeezes her hand until she drops it. "You never know when to give up," he says. He steps back from her, points something at her stomach. We hear a gunshot.
So does Olivia -- her head snaps around. "Etta?" she whispers.
Etta slides down the pillar to the floor, coughing. Windmark looks at her a moment, pleased with himself, and then walks away. Moments later, Peter and Olivia come racing in, pausing a nice, long moment on the catwalk to stare down at their dying daughter. They rush to her side, Peter going "no, no, no, no" and Olivia doing her best to be practical and calm and telling her Etta that she's going to be OK, they just have to move her. Etta tells her there's no point. Peter, as any father would, says they're not going to leave her there. "You have to. You won't make it with me. I'll slow you down," says Etta. Look, I get what she's saying, but wounded Etta is probably no worse an anchor than Walter is.