Chaplin is determined to recover his stolen launch key from whoever stole it, and he's not exactly using a soft touch. Kendal is having to search every member of the crew, who aren't taking kindly to this treatment, not least because Chaplin and Kendal are keeping the missing key a secret between the two of them. Also subject to search is Mayor Julian, who gets a bunch of his stuff confiscated, and Sophie, upon whose laptop Kendal sees the footage of the drug-addled kiss he gave her last week. Things are a little tense between Kendal and Sophie for a while, but eventually she tells him about the soil samples and their trust in each other is restored.
But not before some other stuff happens. Chaplin and Kendal have also stashed Booth, the one surviving member of the Black Ops team from last week, in a hidden location and are trying to get him to tell them who the CIA sleeper agent on board the Colorado is. Booth doesn't know, but he suggests that locating the agent's secret comm site will lead them to the traitor. He also makes Kendal a private offer in which Chaplin gets taken out of the picture so Kendal can run things for a while until the current president is brought down by his own misdeeds. And to sweeten the deal, he offers to have Christine brought to the island.
Aside from the questionable trustworthiness of Booth, there's also the fact that Christine isn't waiting around to be taken anywhere. Kylie Sinclair gets hold of a photo proving Amanda Straw wasn't killed in a plane crash per the official cover story, and Christine waves it all over the news. And then she and Kylie conspire to plant a bug in Paul Wells's car so they can overhear his conversations with Secretary of Defense Curry. Christine has to let Paul kiss her to pull it off, but hopefully it'll be worth it.
Prosser discovers that some of his men are scoring drugs on the island. So he rousts the local dealer, which enrages Julian so much that he straps a bomb to a sailor and drops her in the middle of a party Kendal was throwing the crew. King and Shepard manage to defuse the device, and then go share the kind of sex on the beach that doesn't come in a glass. Chaplin and Kendal roust Julian, who offers up a stooge as the perpetrator of the attempted bombing. Chaplin goes along with the charade and lets Brannan (yes, him) shoot the guy, giving Julian a dire warning not to test him again. But Julian just doesn't listen, and his men nab Prosser, scorch his feet, and leave him stranded in the jungle with nothing but a vial of the prescription painkiller Prosser was hooked on years ago. Well, that and a horrific story about Julian's first day as a child soldier.
Kendal reports back to Chaplin about the hidden comm site on the island, and Chaplin agrees to switch gears and start looking for that rather than the key, which will lead them to the traitor. Who, and not that anyone knows this yet, turns out to be none other than Pilar Cortez. She's been going on about loyalty all episode, so we really should have guessed.
Tonight we've got a previouslies to the previouslies outlining the whole premise of the series each week. Good luck with that.
Kendal's searching all of the crew's luggage in the makeshift shore base they've thrown up somewhere on the island, and they're getting pretty owly about it. Including Shepard, who's a little offended that even she isn't exempt from suspicion. Kendal's selling a cover story that they're looking for an accomplice in the BZ attack that Julian facilitated last week, as well as the stolen EpiPens. He can't exactly go broadcasting the fact that Chaplin's nuclear launch key is what they're really looking for, can they? Kendal chases Shepard off, and when Chaplin shows up, he tells the captain that there's no sign of the key. Chaplin says this needs to stay between the two of them until they've identified the enemy within the crew. Apparently it's been 48 hours since it disappeared, which makes Kendal wonder why they're even still alive. "Our Judas hasn't reported their success yet," Chaplin says blithely, and insists that even Shepard might have gone off the deep end after her father's arrest. Kendal insists that he trusts her, but Chaplin isn't having it, even though Kendal's worried about losing the crew. Chaplin has clearly forgotten that whoever stole the key also saved his life and made sure the sub had breathable air again, or he'd probably be a little less uptight about all this.
On board the Colorado, Prosser is ordering the sailors to open up the lockers under their bunk. One sailor, Kowalski, tries to stash what he claims is a night-guard for his teeth, but Prosser isn't fooled, furiously dragging the sailor into the head and flushing down what is instead a baggie of drugs. Just Say No doesn't just apply to shady nuclear launch orders, after all.
Kendal and Chaplin pay a visit to the Black Ops guy from last week who claimed to be McClure, who they secretly stashed away in an abandoned hut in the jungle somewhere. They're the only ones who know he's alive, so he starts by telling them his real name, Booth. Sic semper tyrannis, motherfuckers. But what the senior officers really want to know who in the crew Booth's working with. Booth drops a hint, prompting Chaplin to mention the widespread rumor that there's a CIA sleeper agent on every sub, just in case a captain goes crazy. Well, whoever the sleeper is on the Colorado, clearly their alarm didn't go off. Booth figures whoever it is must have gotten Chaplin's key, but he insists he has no way of knowing who it might be, and even invites Kendal to torture him again. For now, they leave him chained up and go to see the one other person who might know.