Manly tells Carter that he's sorry for Henry's loss, though he's never really seemed to care. He then asks about Tess. Carter says they aren't putting the right technology together, as he stares at the pool that NewKim just disappeared from. He says that he has someone he needs to introduce Manly to.
Dr. Rivers is up in the med facility, and they've got some sort of plan to save Tess. If Manlius can calibrate his radiation properly, it will release the molecular bonds and all the syn water will leave Tess with her intact. But there's a chance he could decompress all the syn water at once and drown her. Couldn't they test this out on Dr. Bell, who no one cares about? Not that I particularly care about Tess, but Bell seems far more expendable in the scheme of things.
Still, Tess is in the nutrient bath that Henry and Kim developed, which will protect her from the radiation long enough for the syn molecules to get released. Manly takes off her respirator, He puts her under water and gives her a scuba tank to breathe from. He tells her she's going to feel like she's drowning, but he knows that she can do it. She seems unsure, but lays down in the pool. Allison exposes her kid to more radiation by standing by. Fargo isn't seeing any release, and Tess starts twitching and shaking in the pool, but it finally starts working. She's got to hold on, but she's moved on to full-on thrashing... then she's totally still. But that means she's clear and can breathe like a normal person. Manly rushes in and looks like a hero when he gets her out of the water.
At this point, I'm confused, because the scene with Tess seems to have been in the same room as all of the radiation exposing scenes that they used for NewKim, and the pipes with the syn water cooling system are still getting exposed to more radiation. And there have been several other times they've used radiation on NewKim since the initial disaster, aren't they essentially exposing more people to the same exact problem that they are trying to fix? Or did the move to another identical room without the cooling pipes in it? And how have there been no other cases, given that there were at least two instances of radiation use before they figured out the cause? I'm not a scientific genius or anything, but this really doesn't make sense.