Olivia goes out and sits in her car for several moments, staring out the window.
So that's one late-night visit out of the way, and there are three more to close out the episode:
No. 2: Nina Sharp shows up at Broyles' doorstep, and gives him a bunch of pictures showing The Observer in various locations, and she says they were all taken in the last twenty-four hours. "You know what happened the last time he appeared with this kind of frequency," she says. Broyles just stares at her. She says they need to talk.
No. 3: Walter sits alone in the Fringe lab, listening to an old record of old blues. Sounds like Robert Johnson. The record ends, and he lifts the turntable lid to replace the record. Going into his box of LPs, he finds a document. Someone starts playing some notes on the piano as Walter starts rifling through the pages. In the background, out of focus, someone enters the lab. Walter doesn't look to see who it is, but he thinks it's Astrid, and he tells her he found the original document with the extra pages. He reads her an excerpt: "'Our children are our greatest resource. We must nurture them and protect them. We must prepare them so they can one day protect us.' You see, I was..." he says, stopping abruptly as he turns to see that it's not Astrid at all, but the Observer, who politely takes his hat off and says hello. Walter says hello back. "It's time to go," says the Observer. "Is it time," says Walter. Not really a question. He's not really surprised. More resigned. He gets his coat, takes a quick look at the lab, and follows the Observer out into the hall.
No. 4: Nina enters a building that might be her residence, or at least a residence. She needs to be buzzed in by a doorman, at any rate. She rides the elevator, and when she gets out, she's surprised to be greeted by two people wearing balaclavas. Nobody says anything. One of the masked dudes points a gun at Nina point-blank, and pulls the trigger. It's either a silenced bullet or some kind of tranquilizer.