Anyway, they question him about the first two victims, and he explains that Jillian Foster worked with the Ivon Medical Group, which was conducting a drug trial at the hospital. Olivia shows him a picture of the third victim, Jeffrey Mayer, and the doctor knows him too, and is quite surprised to see him. Olivia says that they're going to have to question all their science and medical personnel, but he tells them that they're not looking for a doctor: "You're looking for a patient." He shows them a video about a study that the hospital started about a year ago, on nootropics -- smart drugs. "All of our test subjects started with an IQ of less than 65," he said. So the study was on politicians, amirite? The doctor says their aim was to increase their intelligence until they could function independently day-to-day, which Charlie calls a "worthy goal" and Dr. Levin all gloomily says, "We thought so too."
Then Olivia spots Milo in the background and is all, "That's him!" not surprising the doctor at all. He shows them video of Milo five months ago, with a measured IQ of 56, severe cognitive deficiency. There he is having difficulty with a simple puzzle. There he is rolling his eyes at $#*! My Dad Says and changing the channel to find something a little more challenging. And now there he is reciting the digits of pi to one-thousand decimal places while solving differential equations in his head. "That was after one treatment," says the doctor. "We gave him five." Each one increased Milo's intelligence exponentially, and the final phase of the project allowed subjects to be released to a guardian's care. And after that, they return the subjects to their original state, in order to determine if there are any permanent adverse side effects. "So Milo didn't want to be regressed, which is why he went after Cole Arnett," says Olivia. Levin says they thought it was an accident, and when Jillian was told, she was concerned that the delay in regressing Milo might compromise the results, so she offered to handle the case herself. And wound up dead.
Charlie asks about the third victim, and Levin explains that Jeffrey is a recovery specialist, who they contract with if somebody goes missing. "The thing is, I only put the order in yesterday. Mr. Mayer had not yet been assigned the task," says Dr. Levin.
So the agents get the contact info for Milo -- his sister, who lives in Oyster Bay, out on Long Island. Olivia's skeptical that they should go there, since Milo would have to know that that's the first place people would look, and Charlie makes a joke about never seeing any oysters in Oyster Bay.
From a second level, watching them go, is Milo. He's staring intently at them, and then we get his point-of-view (which is kind of golden-hued). Then his point-of-view gets split in half, one that shows Olivia and Charlie walking together, another that shows Olivia walking alone. It divides again. Four possibilities. And again and again. Snatches of Olivia running, yelling. There's Charlie. There's Milo's sister. There's that annoying "THE END" when you've made the wrong choice in your Choose Your Own Adventure book.
Over to Oyster Bay, where Olivia and Charlie have to break the news to Madeline Stanfield that her brother has killed three people. "That we know of," adds Olivia, just to stick it in a little deeper. She thinks there must be some kind of mistake, that her brother wouldn't kill innocent people. "I suppose he didn't think they were that innocent. You know, after all, they were trying to cut off the medication that was making him smart, right?" says Charlie, and Madeline doesn't have much of an answer for that. She doesn't have any idea where Milo might be now, and Charlie asks to have a look at his bedroom.
While he goes off to do that, Olivia breaks out the good-cop routine and looks at a picture of Madeline and Milo as children. "You seem close," she says, and Madeline says they were: "He was a lot older, but we liked the same cartoons, played the same games."
Olivia says she had the opposite: "My sister and I were close in age, but we fought over everything." Madeline asks if they're close now, and Olivia says that her sister died a few years ago, like thanks for BUMMING MADELINE OUT EVEN MORE, Olivia.
So Madeline talks about how when she was little she used to be scared that something would happen to Milo, like he'd forget to check for cars and run right into traffic. "I worried that he'd never be happy. He'd never feel like, like he belonged." Are you listening, Olivia? Olivia says it must have been hard to watch him struggle, and Madeline says it was harder for him, which was why she agreed to the drug study.
So now that they're best buds, Olivia reminds Madeline that Milo isn't that helpless person anymore: "He's dangerous, and I think you know that," she says, adding that they don't want to see anyone else get hurt, including her brother. Madeline thinks about it a moment, and then digs out an envelope, which she says is a goodbye note that says where she can reach him. Tsk! Snitches get stitches!
So outside, Olivia and her gung-ho attitude wants to call in backup to the Patricia Hotel on Lakewood Avenue, and Charlie wants to slow down because he wonders if that's what Milo wants: "He knows we're onto him. He knows his sister. What if he's trying to set us up?" Olivia's all, "Well, we can't just stand there with our highlights shining in the sunlight," so they call Bad-Astrid, who tells them that it's a mathematical problem without a solution. Olivia asks which scenario is more likely, that they go to the Patricia Hotel or don't. "Suppose he predicts you'll go there, but then you'll predict he'll predict that, so you don't go," she says. "But then he predicts that you predicted that. And he changes his plan, which means that you should go to the hotel. But then he predicts that you'll predict what he predicted too. It's an infinite spiral." Joey? Do they know that we know that they know that we know? JOEY?
So they decide (well, Olivia decides) to go to the Patricia Hotel anyway, because if Milo IS there, at least they have a chance to get him. Sure enough, he's there, and we see him watch Olivia and Charlie get out of their car, and his mind does the possibilities-splitting thing again, with Olivia and Charlie going down the street, and suddenly his outcomes involve Olivia getting buried under a truckload of cinderblock. Since that seems to appeal to him, he closes his eyes and runs the scenario backward: the blocks topple back onto the truck, Olivia goes racing backwards around the corner and takes a hit of oxygen because of a nearby street sign warning people about the poor air quality, right back to the time of 4 o'clock on a digital clock hanging over the street.
And then Milo is standing on the street watching them approach, kind of looking like an autistic gunslinger waiting to draw, only instead of being in the middle of a deserted street in an Old West town, he's on a busy sidewalk in the present day. It seems to take forever for Olivia and Charlie to notice him, and when they do, Milo smiles and starts running around the corner, the agents giving chase, running underneath a digital clock as it changes from 3:59 to 4 o'clock.
The agents chase Milo around the corner into an alley where construction work is being done, with Milo occasionally glancing back to make sure everything's unfolding as planned (we keep seeing his gold-tinted point of view). Charlie and Olivia split up, with Charlie going a different direction to try to cut Milo off, and Olivia and Milo run through a corridor. Milo's starting to clutch at his chest, and when he emerges into another section of the alley, the "Compromised Air Quality" alarm is going off and the construction workers are gathering at an emergency oxygen station. Milo's got his own puffer that he takes a hit off, and keeps on running, to the side of a forklift with a load of cinderblock.
Olivia, chasing him, has time to duck around the load of cinderblock as it comes tumbling down, and continues running at Milo. "Oh, that wasn't supposed to happen," he says, just before Olivia plows into him and knocks him against the fence and to the ground. But she can't really corral him, since she is now choking in the sick-making Hoboken air. Fortunately, Charlie has come around to get the drop on Milo, who tries to flee anyway, getting shot in the leg for his trouble. "You move again, the next one won't be in your leg, buddy," says Charlie as he hands Olivia an oxygen canister.
Later, as Milo is wheeled away on a stretcher, Charlie gives her the gears about passing by a blinking "auburn diamond," which is breaking protocol. "You need oxygen to breathe," says Charlie, and Olivia doesn't get mad at him giving her third-grade science lessons, but just says she doesn't know why she did that, but Charlie knows. "Because you're a daredevil, I get it," he says. Don't forget the gung-ho attitude!
Later, Olivia takes Madeline to see Milo, in some kind of medical prison let's assume, where he's muttering too himself while poring over a tabletop computer filled ever-changing numbers. Olivia explains that the drugs had been in Milo's system too long, so the effects can't be reversed. "According to the doctors, the patterns that he sees are too complex to put into words. His thoughts can now o