Broyles arrives at the hospital, informing Walter and Astrid that a number of spontaneous dry lightning storms have occurred across the Eastern seaboard. Though Walter is reluctant to leave Peter's side, Astrid eventually convinces him to begin investigating the storms. Meanwhile, at Saint Arthelais Cemetery, Sam explains to Olivia that he is not the first Sam Weiss, and that the first man to bear that name - his ancestor - discovered the ancient manuscript while digging for Mastodon bones. He also reveals that the fifth Sam Weiss wrote the books about the First People, while the third and fourth Sams spent their entire lives searching for the manuscript's missing sections. Inside a coffin, they find the box depicted in the manuscript, and though Sam is reluctant to meddle with fate, Olivia reminds him that she is armed and forces him to help.
Meanwhile, Olivia uses the key to open the ancient box and finds another scroll inside, but this one contains an image of her. Walter examines the sketch back at the lab and suggests that Olivia herself is the "crowbar" that can disable the machine. He theorises that Olivia's latent telekinetic abilities could be used to disable the machine, and that the same part of her brain which allows her to cross over should also allow her to affect the machine on the other side. Walter suggests that they practice on "something smaller" and retrieves the quantum-entangled typewriter that Fauxlivia used to communicate with the other universe. Olivia attempts to press the keys on the alternate world's typewriter using her mind, and thus have a message appear in this world, but her early efforts are in vain. As all appears lost, Astrid arrives with the news that Peter has gone missing from the hospital.
Back at the MD facility, Pete recovers and his memories begin to realign. However, the machine's power suddenly fluctuates dramatically and back at the lab, Astrid is shocked when Olivia's intended message - "Be a better man than your father" - suddenly begins to appear on the typewriter. Liberty Island is evacuated, and, with a great deal of concentration, Olivia is able to disable the machine's force-field. As he recalls his time spent with Walter and his romance with Olivia, Peter finally enters the machine.
Peter wakes, finding himself in a devastated, burnt-out version of New York, swarming with military-style Fringe agents. A 9/11 memorial confirms that Peter has not crossed over to the other side, but has instead leapt into his own future. A Fringe operative refers to Peter as "Agent Bishop" and calls him a medic, as Peter realises that he has been injured in the ongoing battle.
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