Walter has pretty much gone catatonic when Olivia and Nina find him. "I can't lose him again," he mutters, because for a minute there we were in danger of letting an episode go by without a reference to Peter's past. Olivia crouches down and uses her best hostage-negotiator smile as she says Walter needs to figure out how to "disable Tyler." "Peter always helps me," Walter whines. "How do I do this without Peter?" Well, they are in New York City, where hack standup comedians are pretty thick on the ground. Surely they could rustle one up here to make wisecracks in Peter's absence. Olivia admits that Peter helps her too (some episodes more than others), "But you can do this." Nina steps up and tells Walter, "I know you're scared, but you're the only one that can help him." Walter seems to get the idea of using an EMF scrambler, whatever that is. "Sounds like a good place to start," Nina smiles encouragingly. As always, she is the master of looking helpful when it's not clear what her motives really are -- yet. Just then Astrid enters to say they've brought Tyler's computer, and he's been doing some "pretty strange searches." Oh, man, better glove up.
In another office, Astrid's showing Olivia some of Tyler's recent searches: women who died in car accidents 14 years ago. Okay, I knew the internet caters to some pretty specialized fetishes, but this is more focused than I thought possible. Olivia notices a pattern: each of the victims would be in their early 40s if they were alive today. "What are you thinking?" Astrid asks. The answer to that should be obvious, but maybe Astrid is just disoriented at finding herself outside the lab for the second time in as many months. Olivia doesn't know yet, but Tyler's most recent search pulls up a newspaper article about one Renee Davies. Whose accompanying photo just happens to be the one Tyler was holding earlier.
Olivia goes to confront Carson with the article, and upon hearing the name Renee Davies, he confesses that she's his ex-wife. Tyler's mother, of course. And not, as I may or may not have suspected, the name of former Kinks frontman Ray Davies after becoming a chick.