At Chez Bishop, Walter is not in good shape; in fact, he suspects he's suffering from a Valium overdose. Astrid offers to take him to a hospital, but he refuses. "Violet Sedan Chair," which at first sounds like word salad, but he's actually referring to a band. "Their debut album always helps me come down from a Valium high," he pants. He wants them to go to the lab to get it. "I might puke in our car," he says apologetically. So Astrid suggests he stay and rest while she goes and gets it. Fantastic idea, leaving him alone, especially after what happened last week. But it's all worth it to keep Astrid's floormats clean.
Back at the MRI lab, Olivia thinks this sounds like the work of Dr. Paris, although she doesn't know why he'd remove pieces of Walter's brain and then preserve them in the first place. "Memory!" Peter realizes. He voices what we've all figured out by now, which is that Newton wants to open a door to the other side. Which Walter has done, but can't remember how. "That is why he can't remember!" he says, rapping on the lightboard. "He literally had the memories removed." "No way," Olivia says amusingly, wondering how Newton plans to retrieve those memories. "In theory he shouldn't be able to, but in theory he should still be a frozen head." Peter says. "He would need to implant the memories into a brain that could interpret them." Gosh, wherever might one find such a brain? FINALLY, Olivia and Peter figure it out, and hit the door running.
On their way, they call Astrid's cell phone, and reach her as she's in her car on the way back to the lab. "Where are you and Walter?" Peter asks. Astrid tells him about the errand she's on -- alone -- and Peter tells her to get back toot-sweet. Astrid says she's on her way and whips the car around. I would have liked to see her pull a handbrake turn, but you can't have everything.
Walter sits sweating in his easy chair and gets up to answer the knock on the door that he thinks is coming from Astrid. But of course when he opens it, there's Newton. "Hello, Dr. Bishop," Newton smiles.
After the ads, Astrid is back at the house and has her gun out, but Walter and Newton are long gone, so the only people she can point it at are Peter and Olivia as they arrive, and that's just not the same. Having lost Walter for the second time in as many weeks, Astrid sputters her apologies, and Peter says it isn't her fault. Although Olivia gives her kind of hilarious look that's like, That's two strikes, A-Farn. Luckily, Peter has an idea: "Last week when Walter got lost, he did exactly what you'd expect Walter to do. He implanted a transponder chip into his neck so that if he ever got lost, I could find him." Snagging the little beeping remote from a shelf in the kitchen, he leads the agents back out the front door. Or Olivia, at least. If Astrid were to find Walter, she'd just lose him again.