Speaking of work, Olivia's at home looking up "monarch" in her FBI Google, or whatever that is, before she decides to get some rest. She crawls into bed -- and her computer reboots. Puzzled, she goes back to it to find an e-mail from John Scott. She stares at the message for a good long while. But she's going in. Of course she is. It's one of this show's trademark "underground abandoned steam shovels" sets. She comes into a room with blue bins stacked all over the place. Olivia finds a bare light bulb and turns it on. Opening up one of the bins, she finds a bunch of frogs, croaking and trying to get out. Startled, she closes the bin and steps back.
The next day at Boston Federal Building, Charlie's all, "Uh, do you know anything about a bunch of frogs?" He just got a PO request from Astrid for a terrarium and ten pounds of live insect larvae. "Is there something you want to talk to me about?" Olivia's cagey about the details (he asks if the frogs had something to do with Mark jumping out the window) because she's got something else on her mind, and she pulls Charlie aside so she can talk about how she's losing her shit: "I feel like I'm going clinically insane, literally. I told you I saw him standing right in front of me." Charlie asks if it's happened again, and Olivia says he's called her, sent her e-mail, sent her a friend request on Facebook -- he won't leave her alone! He suggests talking to Dr. Katz, but she doesn't want a psych eval on her record. She just wants to take some personal leave. Charlie asks if that'll help, and Olivia says she doesn't know. Her phone rings. It's Astrid, saying Walter needs her back at the lab, because he thinks she's cracked the case: "You are not going to believe this, but, um, the guy who jumped out the window? Dr. Bishop thinks it's because of the frogs."