They're interrupted by Henrietta -- damn, can't parents get a moment's peace? -- who pops outside to tell them to come in. Young lady, I know it's the year 2036, but I'm sure your parents raised you to say "please," even in just the three years you had with them!
Inside, Etta introduces them to Anil, who says it's an honor to meet them. Sure, glad to add a few time-displaced Fringe agents ready to amber themselves at a moment's notice for the next two decades!
He identifies the gadget Olivia retrieved for Walter as a "transilience thought unifier, model eleven," which retrieves specifically marked thoughts in your mind and unifying them, keeping them hidden from prying eyes until you want to access them. "But it doesn't seem to work any longer," he says. Typical shoddy workmanship, these days. When I was kid, thought unifiers lasted forever. "It has to be the plan. It was fragmented and hidden on Walter's hard drive by September," says Peter.
Speaking of Walter, Astrid reports that they've found him, and takes them to the computer monitors, where they've found security camera footage from across the street where Walter was taken. We see him being escorted into a loyalist vehicle, and Anil says they'll try to track him with traffic cameras. Peter says the thought unifier is crucial to Walter's plan -- in which case he should stop waving it around like he's hailing a cab with it -- but it's conceivable he could give them that information. In other words, Peter, who just awoke from the amber to a new world of threat and technology, has decided that the whole point of this device that they just discovered today might not actually do the one thing that it's supposed to do. One of the resistance dudes says Walter might be spilling even more than that: "Does he know you're a Fringe agent?" he asks Etta.