Meaning Astrid, who, in an amazing coincidence, studied cryptology even before she joined the bureau. I think it would be great if Astrid was like Chet from The Hardy Boys, who always happened to be getting into a new hobby that always winds up proving helpful to Frank and Joe. Anyway, she thinks it might just be a Caesar shift.

"What's that?" asks Peter, and thank GOD there's something that Peter doesn't know about. Olivia does, calling it a "simple monoalphabetic cipher." "Is it now!" says Peter, grinning at the field-of-expertise reversal. Olivia explains that Julius Caesar used to send messages using a simple substitution code. You replace one letter with another, but do it alphabetically. So if your A becomes E, then your B becomes F, and so on. As Olivia explains, Peter stares at her with barely disguised lust. Astrid thinks the letters could be CIW, DJX or EKY. Now -- and I'm no cryptologist, mind you -- but if you're breaking the code, don't you look for translations that actually mean something? I mean, those are just random letters thrown together, and so I'm not sure why she's tossing out those suggestions when there are actually twenty-five options, if meaning isn't important. "Or ZFT?" suggests Olivia, and Astrid says sure, and asks what ZFT is. But Olivia is already gone. Yeah, DON'T EXPLAIN or EVEN ANSWER, Olivia; it's not like the rest of your team hasn't been working their asses off all day to try to solve this thing while you've been to your daily hair-straightening appointment.

She goes to see Broyles, who's walking on the way to his office, and she explains that she's been going over John Scott's old files, and there was one on an operation tracking a group in Budapest, and the label on the file was ZFT.

This brings Broyles up short, and Olivia asks if that means anything to him.

He unlocks a drawer next to his desk and says a British national named David Robert Jones was arrested in Frankfurt for possession of state secrets. He's got a background in deep biotechnology, notably genetic weaponry, and he went off the grid twelve years ago, popping up every now and then in Eastern Europe. One of the reasons Loeb was in Frankfurt was investigating Jones.