We begin in Boston. It’s a lonely street, with only one suspicious character: Peter. He’s siphoning gasoline. Afterward, he enters a shop, looking for a necklace chain. An Observer offers his help. Peter starts thinking about baseball to keep the Observer out, only to find the Observer does not know what baseball is. He continues trying to think of random things and, after paying with a $20 (which seems quite valuable), makes a hasty exit. The Observer is still prying about the young blond woman Peter is trying to protect. When Peter emerges, there are loyalists on the street. After thumping the Observer with his gas can, Peter makes a run for it. In a flash, the loyalists are on his heels. Just an average day, right?

Peter gives them the slip by ducking into a sewer. He is ready with a gun, which is no match for the flash grenade that comes rolling his way. And… cut to theme.

When Peter wakes, he’s above ground, having come out through a storm drain. There’s a boy standing over him and playing harmonica. After admiring Peter’s gun and pointing out that he is bleeding, the boy starts to stroll away.

Back at the university formerly known as Harvard, Astrid recovers another tape. Walter can only gripe about how long it took to get through the amber. Then, Peter gets back, looking like crap. He recounts what happened, and Etta promises to teach them all how to keep the Observers out more effectively. At the very least, Peter managed to hold onto her necklace chain, which he gives her.

Later, we see the same Observer playing with an old toy Peter had been admiring in the shop, when who should walk in but Broyles. The Observer shows Broyles the tape and asks the purpose of the necklace. Amused, Broyles tells him it’s just something to wear. The Observer cannot understand why Peter took the risk for something so worthless. The Observer also informs Broyles that one of his men failed a security test.

Back at the lab, Team F is going over the tape, which seems to be a bunch of scientific mumbo jumbo. Though the tape is corrupted, Walter has the information he needs. The tube of plans indicated on the tape is hidden on a subway station…crawling with Observers.

Walter leads them then to a trap door under a cabinet in the amber. He is very closemouthed about what is in it. He leads the way into a tunnel… a disgusting tunnel. It is a storage depository of all the Fringe events they ever encountered. Walter says that instead of solving Fringe cases…they are going to create them. (Is it just me, or do some of the items appear to have made it from the episodes pertaining to the timeline that was erased when Peter first used the machine?)

Back at the FBI, we see a man being questioned by the Observer…the man who failed the security test. The Observer replays a video for the man, when he failed to recall the weather on an important day. The Observer accuses him of being in the Resistance, having forged paperwork. He questions the man about the fugitives. The man stays silent, even as his nose starts to bleed. Then the Observer asks who “The Dove” is. The man swears he doesn’t know, and the Observer looks toward the camera. Broyles readies his gun.

After an unsuccessful interrogation, the Observer returns to Broyles. He has found out about the lab in Harvard. The Observer departs to make his report.

Back at the lab, Olivia and Etta keep tabs on the station, watching the loyalists’ route. Etta strings the bullet on her new chain. She says she found the bullet at their old house. She found it in a matchbox inside Olivia’s jewelry box, though the house had been looted long before. She has been wearing the bullet around her neck since she was 13. Olivia smiles and tells her to keep it, recounting that Peter used to call it “the bullet that saved the world.” Just then, Etta gets the ping that the lab has been compromised.

When the loyalists arrive, with Broyles watching, they find the lab empty. It is filled with amber. Once they leave, Astrid pops out of her hidey hole, holding a laser. (What, pray tell, does this portend?)

Walter later arrives at the train station, looking for directions. When they ask for authorization, he wipes them out with the face-sealing gas from way back when. Together, Walter and Peter enter the station. They go down a narrow staircase to search for the plans, hidden cleverly behind a wall plate with “Kilroy was here” scrawled on it. Behind the plate, they find the tube. (Hey, that was easy!)

Meanwhile, Olivia is waiting in the car with Etta. They don gas masks and prepare to make their move. Gunfire ensues as Peter and Walter leave the station. More face sealing. Lots of shooting. The good guys make their heroic escape, leaving some very disfigured guards behind them.

In Manhattan, Broyles works on his computer before shutting down for the night. He glances over his shoulder before sneaking a peek at a photo of Olivia and Peter.

Back with our heroes, the plans they’ve recovered are covered in unfamiliar physics equations. Walter has no idea what it is, even though it’s in his handwriting. A car approaches, one apparently expected by Etta. And who should emerge but Broyles.

Naturally, Olivia is overjoyed to see him. It is a tender moment that seems doomed to go wrong. He tells them that he instructed Etta not to tell them of his involvement, in case they were read. Broyles met Etta five years ago at a crime scene, where he recognized her as their daughter. He then had her transferred into his section, and she recruited him into the Resistance and taught him how to block his thoughts from the Observers.

Back at the train station, the bad guys find a mysterious item that may lead them to their fugitives…

As it turns out, Broyles has come bearing gifts: antimatter batons. Good thing, as an Observer has just showed up. Broyles quickly shoots him. As it turns out, one of the guards at the train station managed to put a tracker on their car.

Another Observer pops up. Peter takes a hit from the air gun thing, but they manage to get away.

The hunt is on. Somehow, the Observers continue to track them to an old warehouse (because it’s always an old warehouse, it seems). Once again, lots of shooting. The team is split up. Peter and Olivia are together, Walter and Etta are each on their own. Etta prowls around, searching for her grandfather (which would be more charming without the gun). But an Observer pops up and quickly catches her. As it turns out, it is Peter and Olivia who find Walter.

Meanwhile, Etta has problems. The Observer asks her why Peter bought her the necklace. The answer he finds is love. The next thing he fines is a knife in her hand, but her plan fails. He takes the knife away and shoots her.  Well, that is a major bummer.

Etta’s family comes running, but it’s too late. She tells them not to move her, or she’ll slow them down. In her hand, she’s holding an active antimatter baton, hard to see a way out of this one, folks. Etta hands Olivia her necklace, and that’s the end. Well, in 26 seconds, it will really be the end.

The Observer, recalling his lesson in love, goes back with the expectation of catching them. What they catch is a face full of antimatter.

The episode concludes with the bereft family running away with their tails between their legs. (Leave it to the Lost writers to write a total suck. Jerks!)