Warning: spoilers follow!
The "Fringe" episode "The Bullet That Saved the World" was the best and most frightening episode so far this season. It was action-packed, non-stop intrigue, likely to tie any fan's stomach in knots. It was also riddled with sadness. Just as the team loses hope, they find new hope. Just as they find hope, they lose it, once again.
Peter goes into a fragile state of mind
Peter (Joshua Jackson) tries to buy a necklace for Etta to replace the one she handed over to create the laser, only to be cornered by an Observer. He attempts to protect his thoughts as Etta had trained him but finds it nearly impossible. His only choice is to escape but is injured by a powerful concussion bomb. He later learns from Etta that it can take about a year of training to successfully block the Observers from observing thoughts.
Fun with weapons of mass destruction
The team watches the next Betamax tape and learns that the next object they must find is a tube hidden in the subway. The problem is that the area is littered with Observers and Loyalists. They must create a diversion and find a way to make it out alive.
Walter informs the team that they can find what they need in a hidden basement where he has been hiding documents and bits of evidence from every Fringe case they ever worked on. Some of them are dangerous, some are gross, and one is an old jelly "doughnut hole" with weird tendrils that is "still spongy." Walter actually puts a bit of the jelly in his mouth. How can something be so hilarious and utterly stomach turning at the same time?
After a bit of searching, they finally find some tools they can work with. As Astrid (Jasika Nicole) works on the "weapon of mass destruction" they plan to use, Walter (John Noble) plays with a big air gun. He shoots a ball past Astrid's head as she works on the delicate substance, delighting Peter and upsetting Astrid.
The return of Broyles
Broyles (Lance Reddick) appears to be working with the Observers but is actually an expert at hiding his thoughts. One of his men has slipped up, and he turns out to be part of the Resistance (just like Broyles himself). The Observers question him and learn about the lab where the team has been working!
Re-ambering the lab
The team loses all hope when they realize the Observers have learned where they are. If the Observers know that the team has been there, they will never be able to return. All the tapes containing The Plan to save the world will be lost. Olivia (Anna Torv) saves them all when she comes up with the brilliant idea of re-ambering the lab.
A dangerous Observer revelation, based on a trick
Unfortunately, the re-ambering of the lab leads Captain Windmark (Michael Kopsa) to believe that nobody had been in the lab in the first place and that the idea that the team was there was a thought-lie. This in turn leads to his dangerous revelation that other humans may also be capable of hiding their thoughts, or creating thought-lies. The team definitely took a step forward and two steps back with that one, but at least they saved The Plan.
The death of the teacher, the daughter, and the connection to the ways of 2036
After the team grabs the tube for The Plan, they meet up with Broyles for the first time since they were de-ambered in 2036. Poor Broyles is the only old guy in the group having aged all those years. They are not alone for long. An Observer shows up, and the team realizes that one of the men at the subway left a tracker on one of their cars.
The team hides in an old warehouse, but Observers begin popping up everywhere. It's no use. Windmark finds Etta, and with an evil smirk on his face, shoots her. This, after learning that she was doing it all for love. To the Observers, love is just a tool to use against the humans. Windmark plans on waiting for the others to go back to Etta because of their love for her, so they can trap the whole team.
The team does go back briefly, but Etta is too far gone. She also holds a bomb she has already set to go off. Olivia takes "the bullet that saved the world," once shot into Olivia's Cortexiphan-saturated brain, back from her daughter as she fades away. It's really too bad that it's not a magic bullet that can save the world again.
The Observers go back in to catch the team, but they have already gone. Frustratingly, Windmark catches sight of the bomb right before it takes down the warehouse, and transports himself outside just before the destruction.
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