Fifteen people trying to crack a code broadcast on shortwave radio wind up with retrograde amnesia, which you hope at least lets them start fresh with a new hobby that’s actually interesting. But the Fringe team wants to figure out the source of the transmissions, not judge.
The broadcast — a series of numbers that gives shellshocked Lost fans flashbacks — is traced to a silver box, installed by a man who gives Alias fans flashbacks. Looking for help, the Fringe team turns to Markham, who gives them a book about pre-dinosaur humans who were wiped out by a cataclysm, and a chart in the book corresponds perfectly with the numbers being broadcast — which are separate from the amnesia-causing attack by the guy from Alias.
The Fringers close in on him, only Fauxlivia’s way ahead of them, mainly because he’s a shapeshifter from the other side, and she takes him out — out of his building, many stories up, and he plunges to his death before Fringe can learn anything from him. She’s running scared herself because her non-Olivia-like behavior is starting to raise some red flags among the people who know Olivia. Except Peter, who seems to remain oblivious.