In her military prison cell, Sarah sleeps peacefully until her cell door creaks open, waking her. She walks outside and finds Kira playing and beckoning Sarah to follow her. Sarah runs after Kira and it’s suddenly dark as they crawl into a fort of sheets. Sarah loses sight of Kira but runs into Rudy, sharing blood and being all kinds of creepy with…herself (severely dehydrated, from the looks of it). At this, Sarah wakes because that weirdness just had to be a dream, and the icky cherry at the end of it makes her puke up her last bit of nutrients. She lies back down in a cold sweat and finds a bandage on her neck in the same blood-sharing spot from her dream, proving that it wasn’t all a dream OHMYGOD.
Paul meets with a man and delivers Parsons’ black book. The man tries to explain it away, but Paul calls it what it is: unsupervised and unsanctioned research on civilians. The man tells Paul to get some evidence of Dr. Coady’s nefarious activities or they can’t move on the book at all.
Felix and Siobhan Skype with Kira, who seems really happy in Iceland with Cal. She wonders if Sarah’s mad at her, but Felix and Siobhan tell the sort of lie people tell children when they don’t want to be the bearer of bad news or hard truths. They say goodbye and Siobhan tries to reassure Felix about her people locating Sarah, but he isn’t impressed. She tells him that her people think they’ve gotten a lead that the Castor camp might be in Mexico, and Gracie serves them tea because she’s got nothing else to do, really. (Read a book, Gracie.) This turns Felix’s attention to her, who they know is now suffering from a mysterious ailment, and Siobhan is like, “Oh, Cosima’s got that.” She’s trying to show Felix how to survive worry by continuing to live.
Cosima wakes up to a buzzing phone and an almost nude Shay in the kitchen. She finds several missed calls from Scott as Shay offers her a fresh juice and asks who Sarah is. Cosima immediately goes on the defensive, asking what Shay knows about Sarah and how she heard that name. Shay says Cosima was saying it in her sleep and Cosima relaxes, saying Sarah is “like” her sister, but a wilder version.
Alison and Donnie have stripped to their skivvies to make it rain in their bedroom. Their daughter Gemma walks in and is totally confused by the scene (because why wouldn’t she be?!) and they shoo her away to talk business. Alison is meeting with Jason Kellerman again and Donnie, flirting, says he wants to be there because he’s craaazy jealous. Also, if they’re going to expand, he wants to be on equal footing as partners with Alison. She loves this assertive Donnie and leaves with a grope and a smooch.
Cosima arrives at Dyad and Scott immediately jumps down her throat about being late. When she swipes into her lab, she finds Delphine waiting, who says she came back as soon as she heard Sarah was missing. Now she has a ton of questions for Cosima. How did they get their hands on a Castor brain? Why are they studying Gracie? And did they notice the same misfolded protein in both of them?
Paul pays Sarah a visit in her military cell but finds her missing. He heads to medical and sends Miller away, asking a feverish Sarah what’s wrong. She says they did something to her last night, that she doesn’t feel right, and begs Paul to give her a gun and a car to try to escape. He says he can’t and she’s like, “Pick a side, already! #yousuck.” Dr. Coady shows up, saying she gave Sarah an anti-inflammatory which she’s having a reaction to, but Sarah calls her out, tossing out that Rudy was there when Coady did whatever she did last night. Before Paul and Coady leave, Sarah asks is Helena got away and Coady’s all, “Yeah, but she won’t last. Either the desert will get her or Rudy will.”
And out in the vast desert, Helena runs with Rudy on her tail. She falls down and Pupok shows up, telling her to get up and keep moving. Helena says she has no energy, but Pupok thinks she just feels guilty for leaving Sarah behind. Helena denies this, and to prove her point, she says she’s just hungry and eats Pupok. (But Pupok’s imaginary, so what the hell did she eat?!)
Paul asks Dr. Silva what was done to Sarah but he says he wasn’t in the loop on this one and Coady only includes him when she sees fit. Paul is like, “This is BS. Since when don’t you have any medical authority around here?” So Silva explains that when Paul was away, Rudy came back with a sick girl with bloodshot eyes and after that all medical testing got really secretive. Then Coady mandated that the Castors all document sexual partners – including locks of hair – to look for genetic precursors. He thinks Coady is getting baseline numbers as “before pictures.” He doesn’t know what she’s planning, but he leads Paul to her quarters to find the materials to prove it.
As they wait for the elevator, Delphine tries to casually mention Cosima’s recent absences and tardiness, asking if Cosima needed to tell her anything and Cosima has a big “Nunya” for her. The elevator doors open and Felix has brought a frightened-looking Gracie for more proper testing at Dyad. Cosima and Delphine lead Gracie into the lab as Felix pulls Scott aside for a request on the low: he wants Scott to take him to see Rachel. Felix thinks he can pump her for information about Castor.
Paul visits Mark and asks him why he brought Sarah in. Mark says that since he was with Rudy, he needed to make the call to either terminate her or capture her, so he did. Paul asks if marrying Gracie was “a call,” too, and Mark says he simply fell in love. Then Paul asks for an unofficial favor.
Alison brings Jason a card and a gift bag full of the money he’s owed and tells him that she and Donnie want to take their business to the next level. Then a car pulls up, revs its engine, and speeds toward them before we realize it’s Donnie. He’s bought a new car with $10,000 cash and Jason knows this kind of nouveau riche behavior means they aren’t ready for the big time yet. Donnie disputes that, but Jason insists they need a better way to launder money than handmade soaps if they don’t want to attract the attention of the authorities when they want to buy a car. Alison says she’s got a business plan and Jason and Donnie are all ears.
Mark gives Paul the keys to Dr. Coady’s office, saying he has five minutes to search inside. Simultaneously, Cosima explains to Gracie about the protein she shares with Mark and his brothers. As Cosima tells Gracie she thinks Mark transmitted the protein to her, Paul finds files in Coady’s office. The files contain medical information on several women who suffered such varied medical issues as abdominal pain, vaginal bleeding, and atrophied ovaries after being with a Castor, and Mark enters the office. Gracie doesn’t believe Mark made her sick, as he begins to look through the files Paul found. He’s panicking at the implication of their contents, and when he finds one on Gracie, Paul says his defect is sexually transmitted and loads a gun.
Sarah is still suffering through fever as Coady, Miller, and other soldiers look on and monitor her vitals. Paul comes in and places Dr. Coady under arrest for sterilizing women, saying she’s unfit to lead and disarms Miller because he was getting a little froggy. He has Miller put in a cell and Coady admits that she infected Sarah with the disease. As Dr. Silva tries to save Sarah, she hallucinates the presence of the youngest Leda clone we saw at the end of last season, Charlotte. Charlotte beckons Sarah as Paul cuffs Coady and arms Silva, telling him to protect the room. Sarah follows hallucination Charlotte to a path leading to a bright light and that can’t be good.
Hallucination Charlotte walks with Sarah to the end of the path and, alone now, Sarah arrives to find Beth at Siobhan’s house, making tea. She tells Sarah of the day Paul moved in with her. Beth says Paul only had two suitcases to his name, which really should have been a red flag, then guilts Sarah about taking her life. Beth pops some pills and lashes out and Sarah tells her that she’s trying to finish what Beth started and protect her sisters, but she’s still failing. Sarah feels as though she’s let them down, and Beth asks why Sarah took her life, anyway. Sarah says she did it for Kira and Beth says that, since people often do terrible things for the ones they love, Sarah should stop asking “why” these things are happening to her sisters and focus on the “who” of it all. With a final reminder of Beth’s suicide, Sarah wakes from her fever dream and immediately asks for Paul.
Paul is on the phone with the man from the bench reporting all that concrete evidence he was supposed to find. The man tells Paul that the next thing he needs a formal removal of command order and an extraction team and says he can have a team on site in six hours. Paul tells him that Rudy and his partner are still out on patrol and the man tells him to leave him out there and focus his attentions on not letting the situation explode before six hours have elapsed.
Felix comes to visit Rachel and she recognizes him – but her speech functions are still impaired. He reminds her that he doesn’t need to be particularly nice to her given the past torture and swears that he’ll harass her every day if she tells anyone he’s been to see her. Then he asks about Castor and she says she thinks they’re rumors. He humiliates her by painting an eye on her bandages and taking control of her wheelchair, but she only asks for him to get her out of Dyad. Scott intervenes and Felix leaves, and on his way out, Scott notices odd symbols on one of Rachel’s paintings.
Alison reveals to Donnie that she plans to buy her mother’s business, Bubbles, to use as a front for their drug business and she, Donnie, and Jason go inside to check it out. She and Donnie explain all the ways that using Bubbles is a good idea and he agrees, so they’re selling soap on a large scale!
Gracie mourns her new inability to have children, but tells Cosima that part of her feels relieved. Cosima assures her that this doesn’t make her a monster and Felix escorts Gracie out. When they’re alone, Delphine tells Cosima that she misses her (UNFAIR!) and a teary-eyed Cosima walks out without a word.
In the desert, Rudy gets a call about the “situation” at the base and tells his partner they’re needed there.
Delphine is getting deep into some booze and her feelings as she looks at surveillance photos of Cosima and Shay. She even has some video on her computer and watches it like a French clone of Rachel.
Cosima goes to Shay’s place and tells her she was going to say they should slow things down but now that she’s there really just wants to kiss her face a lot. (What kind of hot and cold, “I like you but not too much” crap is that Cosima?) They make out and Cosima gets a call from Scott who’s connected the symbols in Rachel’s painting to Duncan’s copy of Dr. Moreau. He thinks Rachel knows the code.
Freed, Sarah processes Paul’s news about Coady’s human sterilization trials. Then she asks if he loved Beth, and he said he’ll live with her death and only approached Dyad because they thought they had answers. Now she wants to speak with Coady. Coady reveals that she knew Sarah would be okay because Castor and Leda have the same disorder. She says Sarah’s fertility indicated she’d beat it and says she only conducted her trials to understand the defect. Paul realizes Coady wanted to field test the defect as a weapon and she confirms she’d like to end wars before they start, sure. Then Sarah asks the “who,” and Coady doesn’t answer.
Rudy’s partner drives the Jeep back into base and is patted down and held. Rudy slips from underneath the vehicle into a hall, then cuts a guard’s throat. He meets up with Miller and they arm themselves, Rudy adding that Paul and Sarah is still out there.
Paul and Sarah exit Coady’s office and Mark tells Paul that Rudy’s patrol came back without him. He says he checked the satellite phone and thinks they got a call from “the home team.” Putting it together, Paul calls the man on the bench, who is weaving through traffic. He lies to him that Rudy’s patrol is still out and the man rolls with the lie, proving he set Paul up. Paul orders Mark back to his quarters and not to tell anyone they spoke, then he and Sarah make their way out as Mark tells Paul to make things right. As they creep around a corner Paul sports Miller. Miller backs into Paul’s attack the retaliates by stabbing Paul several times in the abdomen. Paul snaps Miller’s neck and Sarah rushes over as he bleeds out.
Paul rallies his strength and leads Sarah out, locking a little vent behind him. He leaves Sarah to go without him and says it was never Beth he loved (but her).
Rudy has taken out everyone on Paul’s side and he and Coady enter the lab and find Paul with the baby Castor material. Coady lets Paul know his devotion to the Castors was pure and he urges her to cure them and knock out all the life ruining she’s been doing.
Sarah leaves and goes down the tunnel. Coady says she can’t turn her back on all her research and shoots Paul several times – and he reveals he’ was holding a grenade. It explodes and rocks the whole location, including the tunnel Sarah is using to escape and knocks her into a wall. Helena reappears in the tunnel and helps Sarah escape.
Rachel looks at a photo her her and her father as she continues to paint his symbols between wracking sobs.
The Questions: Did Rudy and Coady survive the explosion? Does anyone willing to do something about it know about Coady’s trials? Is it weird to you, too, that Delphine eases into casual villainry to effortlessly? Will Rachel really be able to help Cosima and Scott crack the code? And will that be enough for Cosima to find a cure for the protein defect?