Olivia cautiously says that may be so, but the other McClennan can never know about his twin here. "You understand that. There's no other road for him," says Olivia, and a clearly disappointed McClennan agrees, so I'm sure THAT'S not going to be an issue.
So Olivia goes outside where Lee and Fauxlivia are discussing the newest victim, Noreen Miller, who disappeared from a gas station rest stop about an hour ago. They've got an image from a security camera that shows this universe's McClennan sitting at the picnic table. Great job by the gas station security cameras! Most gas station with security cameras focus them on the pumps to catch people who gas up and dash off without paying, but this one wants to make sure nobody's loitering too long.
Olivia says McClennan thinks he can help them, so everyone trundles back inside, only to find he's not in the living room. "Bathroom," says the worst guard ever. Olivia and her photographic memory spot the fact that the photograph of McClennan's father is gone as well, and sure enough, when they get to the bathroom, the window's open and he's long gone.
Back at Fringe division, Col. Broyles is alive and appears to have all his limbs, so he's got that going for him. Lee and Fauxlivia fall all over themselves each trying to take responsibility, but Broyles isn't interested in playing the blame game right now. That comes later, with glowers.
Fortunately, they think they know where McClennan's going -- to find his counterpart to try to stop him. Oh. So all they have to do is find this universe's McClennan, which they couldn't do and why they brought Earth-1's McClennan in the first place! But at least they knew where non-murderous McClennan was, which helps Astridbot calculate the possible routes he could've taken in the time he's been missing. Plus he's not from this universe, so differences in comprehension (plus lack of Show Me, unless he steals one) makes it easier to track him. Still, exponential possibilities means sorting through the data, even with their facial recognition software, will take time -- about thirteen hours, calculates Astridbot, failing to add that by the end of those thirteen hours the possibilities will be astronomically exponential again.
Fortunately, Olivia has an idea, and without even hearing it, Fauxlivia points out that Astridbot processes more information in an hour than the two of them will in their lifetimes. "She didn't see the photograph of John's father, and I did. Now, John said his father worked as a farmhand, so if we can trace the farm, then we..." says Olivia, and Fauxlivia interrupts to say, "Yeah, but we can't because John's father didn't own the farm, so his name wouldn't be on it." Oh, well, then DON'T EVEN TRY THAT, Fauxlivia, what the fuck? Olivia doesn't appear to be taking it personally, thank god, and just points out that in the picture, McClennan's father was standing in front of a tractor with commercial plates, and she rattles off the number. God bless her photographic memory! In this case, her photographic photograph memory!