Mythology of Fringe
Fringe is an American science fiction drama television series originally broadcast from 2008 to 2013. The show, created by J. J. Abrams, Alex Kurtzman and Roberto Orci, is based on the fictional Fringe subdivision of the Federal Bureau of Investigation, responsible for investigating cases related to fringe science. As the show progressed, the mythology of the show was revealed, consisting of a number of recurring elements (such as alternate realities), locations and characters used by the show's writers to serialize story arcs and link earlier episodes with later ones, even across seasons.
Massive Dynamic is a fictional multi-faceted corporation working for the betterment of medical, communications, energy, transportation, and entertainment technology. It was founded by William Bell and is currently managed by Nina Sharp, William's friend and romantic lover from the past. Upon the death of Bell, the company ownership was fully bequeathed to Walter Bishop. However, when the timeline was rewritten, Walter Bishop did not gain ownership.
Cortexiphan is a nootropic drug developed by Walter Bishop and William Bell designed to enhance the mental abilities of the host. Initial exposure to the drug as an adult can be lethal, so trials were performed on children in at least two locations, including a day-care center in Jacksonville, Florida. A young Olivia Dunham was a part of the Jacksonville trials while she was in the care of her mother and abusive stepfather.
The exact response to Cortexiphan varies from child to child. Manifested psionic abilities include telepathy, mind control, pyrokinesis, telekinesis, and the ability to cross between universes. It is later shown that it also has slight regenerative abilities. Walter's tests, shown in the flashback episode "Subject 13", often required coaxing the child to demonstrate their powers through emotional stimuli; in the case of Olivia, he found it necessary to frighten the girl to bring about her powers.
Several other minor characters have been shown to also have been part of Walter and William's trials. The affected adults find they have weak bonds between each other. Some of their powers do not work on their fellow Cortexiphan patients while other abilities work only on Cortexiphan patients. Three of them reappear during the season two finale to aid Walter and Olivia to cross over to the parallel universe, but all three ultimately die after their crossing.
During the first half of season three, where Olivia has been captured by a version of Walter (dubbed "Walternate") in the parallel universe, Walternate and his research lead Brandon to discover the presence of Cortexiphan—to them, an unknown substance—in Olivia's blood and attempt to recreate the drug. They discover that the drug is lethal to adults and Walternate refuses to let Brandon test the drug on children. They ultimately come to use Olivia again, dosing her with a synthetic mix that is able to articulate her abilities and allow her to cross universes again. Olivia later uses this synthetic mix to escape the parallel universe.
In season four, Olivia is dosed with cortexiphan once again by an Shape-Shifting alternate of Nina Sharp. This along with her love for Peter Bishop causes her memories from the original timeline to reemerge. She is later activated by William Bell in his ultimate plan to destroy the two universes. Olivia's powers include controlling people in a "jedi mind trick" kind of way and being able to safely cross between universes. Cortexiphan also plays a key role in helping Olivia achieve a key goal and outwit the Observers during the Season Five finale.
The parallel universe
While the show is based in the prime universe, several of the events are driven by the influence of the parallel universe. The existence of the parallel universe was postulated by Walter and William while under the influence of psychedelic drugs, and they were able to create a window-like device to observe the universe from their own. They later theorized ways of transporting objects from one universe to the other; one involves the use of frequency harmonics to send objects across at certain times, though through conservation of mass, an object of similar mass would be brought back some time later.
Within Fringe, the prime and parallel worlds are inexorably linked, hypothesized by the characters as the result of a divergent event in the past that formed the two universes. Quantum entanglement of objects between the two universes is significant, having been shown as part of the function of the doomsday device and an electric typewriter used by shapeshifters to communicate with the parallel universe. The parallel universe appears more technologically advanced than the prime one; in the keystone second season episode "Peter", which takes place primarily in 1985, the parallel universe is shown to have cell phones, and zeppelins appear as a common form of transportation. In the show's present (2009 and onward), John F. Kennedy is alive as an ambassador to the United Nations, and other figures like John Lennon and Martin Luther King, Jr. are also alive. The United States in the parallel universe only consists of 48 states; while there exists a North and South Texas, other single states appear to take the place of two separate states in the prime universe, such as both North and South Carolina being the single "Carolina" in the parallel universe. Furthermore, much of western California has been lost, suggesting that a large earthquake along the San Andreas Fault has caused much of the coastal region to sink below sea level. Other effects on the global scale have caused sheep to become extinct, and made coffee and avocados valuable rarities. The singularities that plague the parallel universe can lead to destructive voids; to prevent these, the Fringe division there uses a fast-setting amber-like substance to prevent weakened areas from becoming destructive, but with no regard for innocents that may be trapped within it. A mass blight has affected vast areas of plant life, such as the area around Boston. While the September 11 attacks still occurred in the parallel universe, only the White House and The Pentagon were attacked, and the World Trade Center remains standing. Other changes exist in the parallel universe's popular culture; Eric Stoltz stars in Back to the Future, the musical Dogs has replaced Cats as the longest running Broadway musical, the Sherlock Holmes books were never written, and many comic book characters are different or do not exist such as Green Arrow being Red Arrow and Batman being the Mantis. In the Fringe episode, "6:02 AM EST", a radio broadcast of the Dodgers versus the Expos at Ebbets Field can be heard in the alternate universe, suggesting that the Major League Baseball franchises of the Montreal Expos and the Brooklyn Dodgers were not moved from their original cities.
A common theme of the show is "there's more than one of everything", and this comes about in a number of doppelgänger-like characters that are part of the parallel universe.
- Olivia's counterpart has been named by the prime universe characters as "Fauxlivia", borrowing from fan-based names. Though also a member of the parallel Fringe team, Fauxlivia is a redhead, and more confident, personable, and a better marksman than Olivia. Prior to the third season, she had a boyfriend named Frank who worked for the Centers for Disease Control, but he left her after discovering her pregnancy by Peter.
- Walter's counterpart is "Walternate", a name given by Walter himself. Though his life was similar to Walter's prior to Peter's abduction, Walternate became resolved to get his son back. He is the United States Secretary of Defense and directly in charge of the parallel Fringe team.
- Lincoln Lee is first introduced as a brash lead agent in the parallel universe's Fringe team; his prime universe counterpart is a quieter agent for the FBI that comes to encounter a Fringe case.
Some counterparts have already met their demise. Peter is really the Peter of the parallel universe, abducted by Walter to replace his Peter after he succumbed to a childhood illness. William Bell asserted that his parallel universe self was killed in a car accident while a young boy. Colonel Broyles of the parallel universe is killed while giving Olivia time to escape to the prime universe (but then reappears when the timeline is rewritten in the fourth season). The alternate Lincoln Lee is also killed by a new hybrid shapeshifter in late season four. Other smaller characters are also alive on one side and deceased on the other as both Peter's and Olivia's mothers are dead in the prime universe but alive on the other side.
The Pattern is a key element from the first season of the show. In trying to track down David Robert Jones, Olivia discovers that a large number of events studied by the Fringe division point to the fictional Reiden Lake in New York. Walter later identifies this epicenter as the weak spot between universes, created by himself in 1985.
When Walter's son Peter died from a genetic disease in the prime universe, Walter had discovered that Walternate had found a cure for his own Peter but was distracted by an Observer at the critical moment. Walter recreated the cure, and used an untested means of crossing over at Reiden Lake, intending to give the cure to Peter and leave. Due to an attempt by Nina Sharp to stop him from using the untested device, Walter lost the cure, and instead brought Peter back to the prime universe to administer a new batch, intending to return the child. Walter reveals that his untested device shattered the fabric of reality between the two universes, and was the source for the Pattern and other smaller epicenters in the prime universe and even larger fringe events on the other side.
The "Great Storm"
The "great storm" is a phrase said by William Bell in communications to both Nina Sharp and Olivia with regard to the conflict between the two universes. The conflict arose directly from Walter's abduction of Peter from the parallel universe. As shown in the events of "Subject 13", Walternate is unable to explain how his son had disappeared despite being the United States Security Czar, and only when young Olivia temporarily enters the parallel universe under emotional stress does he come to realize its existence. From a sketchbook given to him by Olivia, he realizes Peter has been taken over there, and with new resolve, vows to recover his son. This leads to Walternate's creation of the shapeshifters that can cross between the two universes to act as his agents in the prime universe. His actions are further spurred by the damage of Walter's crossing, creating numerous singularities that tear at the parallel universe's fabric of reality.
According to Nina, William had warned her that the "great storm" would cause one of the two universes to be completely destroyed by the other. Such events are shown to come to pass in the future Peter witnesses while using the Machine in "The Day We Died", in which the parallel universe had been fully obliterated by the singularities. To try to stave off this occurrence, Peter uses the Machine to create a bridge between the two universes to allow both sides to work together to avoid this result.
Yet another great storm, if not the original one, appears in the season four when David Robert Jones (alive in the adjusted timeline) tries to destroy the universes through use of the cortexiphan subjects and by other means. It reaches its climax when it is discovered that William Bell is the mastermind. He activates Olivia to destroy the two universes to create a universe of his own design. However, this plan is stopped when Walter shoots Olivia therefore killing her and stopping her from being the source of the destruction.
ZFT, an acronym for the German phrase Zerstörung durch Fortschritte der Technologie, literally translated as "Destruction through Advancement of Technology", is a cult-like group of agents working to open a gateway between the two universes regardless of the cost, and are featured as the primary antagonists in the first season. The cult follows the ZFT manifesto, a document describing how to open a gateway between universes, apparently written by Walter before his period at the mental institution. Though by the show's present, Walter has forgotten much of the science behind this, it is revealed that William Bell purposely cut away pieces of Walter's brain to make him forget how to cross universes.
The cult is led by David Robert Jones (Jared Harris), a former biochemist from Massive Dynamic. Though during the first season, Jones was incarcerated in a German prison, his agents are able to recover a teleportation device created by Walter to extract Jones from prison. The Fringe division discover that Jones and ZFT are behind many of the events that form the Pattern, and use it to discover Reiden Lake, a weak spot between the universes where Jones is attempting to cross over. Fringe is able to stop ZFT in time, killing Jones when he is trapped part-way through the portal when it is closed.
In the alternate timeline, because of the absence of Peter, Jones was able to complete his journey to the alternate universe, and has since started constructing a new type of shapeshifter that has infiltrated both the prime and parallel universe, including high-level positions such as Walternate's chief scientist, Brandon. He has also blackmailed Colonel Broyles with the cure for his son's disease in order to control the parallel fringe division. With his agents' help, Jones has collected a significant quantity of a mineral called "amfilocite", which reportedly has enough explosive power to blast a hole between universes. Jones is also shown working with the parallel universe's Nina Sharp on a project involving dosing Olivia with cortexiphan in order to activate her and destroy the two universes. Other parts of this plan involve merging portions of the two universes (via amfilocite), and creating genetically modified creatures to inhabit Jones' new universe. In the end, it is revealed William Bell was the mastermind and was presumably the true head of ZFT. David Robert Jones is then killed by Olivia (as his death was a necessary sacrifice), and his pawns (alternate Nina Sharp and alternate Broyles) are caught. Bell's plan of destruction are stopped when Walter shoots and kills Olivia causing the destruction to cease as she was the power source.
Shapeshifters are human-machine hybrids created by Walternate (and partially by William Bell) in the parallel universe. They were designed to be able to cross between the universes via dangerous unorthodox means. Their blood contains high levels of the element mercury, which is often the only way to distinguish them from true humans. They arrive in a shapeless flesh form until they can extract the features of a human using a special device, hooking one end to the palate of their mouth, and the other to that of their victim's mouth, and take on their form, killing the human in the process. This device is necessary to maintain this form; without it, they can prolong their appearance for a short time by digesting mercury.
Shapeshifters are able to stay as sleeper agents for indefinite periods of time; in one case, a shapeshifter raised a family until he was called into action. Each shapeshifter carries a data disc located at the base of its spinal column to contain encoded information regarding its mission. Shapeshifter agents communicate with the parallel universe using a Selectric 251 typewriter located in secret room in a typewriter repair shop that is quantum entangled with an equivalent typewriter in the parallel universe.
In the fourth season premiere episode, "Neither Here Nor There", a new type of shapeshifter was introduced. Similar to Walternate's versions, they are human-machine hybrids, including a bio-mechanical device similar to the data disc found in Walternate's versions. These shapeshifters require components from the blood of human victims that suffer from heavy metal poisoning to maintain themselves, otherwise exhibiting translucent skin. In "Novation", they are described as being even more human-like than Walternate's versions and being able to switch between every identity they've ever taken, making detection of them nearly impossible without invasive surgery to locate the data disc. "Enemy of My Enemy" shows these shapeshifters to be of David Robert Jones' creation, with a goal to infiltrate the highest levels of government to help execute his plans.
Due to Walter's crossing, the parallel universe (and the prime universe, to a limited extent), suffers from weaknesses in the fabric of space-time, potentially creating gravitational singularities. "Amber 31422" is a gaseous mixture deployed over an area which solidifies to seal off these weaknesses. Living creatures are entrapped inside the solid, like "an insect trapped in amber".
The amber is believed to originally have been developed by Walternate. Extensive quantities of amber have been used: notable examples include the entire area around Madison Square Garden ("Over There"), and a large portion of the city of Boston ("Over There", "Entrada"). The use of amber is an emergency protocol, placing the protection of their universe over the lives of innocents trapped within the "quarantine zone" before the amber is released ("Over There"). In the episode "Amber 31422", Walternate reveals that those trapped in the amber are still alive, a fact kept secret from the public to prevent civil unrest. Furthermore in the same episode, it is shown that the amber has devices placed around it for the purpose of self-healing; cutting into the amber will cause it to reset to retain its structural properties.
In the prime universe, the use of amber was introduced in the first-season episode, "The Ghost Network", where it was used aboard a bus. Massive Dynamic retained a sample of this amber and developed a synthetic equivalent by the time of the third season episode "6B", and aided Walter and the Fringe division to create a release system as a last resort to stop a developing singularity. In the future vision experienced by Peter in "The Day We Died", amber has been used in several areas, including in Central Park. In another alternate future seen in "Letters of Transit" and later season five episodes, Walter, Astrid, Peter, Olivia, and William Bell deliberately place themselves in an updated version of the amber, placing them in suspended animation. This new amber is more structurally sound than the previous types, and while it can be restored to its previous gaseous state, which is used to free Walter, Astrid, Peter, and later Olivia, the effect only lasts a few seconds before it reverts to its solid form.
The Wave Sink Device
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Introduced in "Over There", the Machine, or Wave Sink Device, is referred to as a doomsday device constructed from numerous components that, in the prime universe, were hidden across the globe, the coordinates encoded in the broadcast of various numbers stations. The First People books claim that the Machine was constructed by the First People, and has the power to destroy or create universes. Machines exist in both universes, and appear to only react to Peter; both universes possess a drawing that show Peter's eyes flaring out while using the Machine. They are connected through quantum entanglement, meaning that certain events that affect one machine will affect the other, such as its activation.
In the alternate universe, Walternate uses his resources as the US Secretary of Defense to actively search for the pieces of the Machine, believing that it can be used to heal the decay that his universe is suffering from. However, he is unable to recover all of its pieces, and thus resorts to sending Fauxlivia over to the prime universe as a spy in order to recover a critical piece of the prime universe machine. Without Peter to power the machine, Walternate is forced to use an alternative source, in the form of blood from Peter and Fauxlivia's infant son, which he uses to successfully activate the machine.
This does not result in the desired effect. The activation of the alternate universe machine causes the prime universe to accelerate its already-beginning decay, while doing nothing to halt the decay of the alternate universe. It also causes the prime universe machine to activate a force-field to protect itself; it violently repels any object, including Peter when he attempts to access it. Sam Weiss later claims that this is because the machine is "frustrated", believing Peter to already be inside it when he was not, and acting to protect him from danger. He also claims that this is causing it to act like a doomsday device, when in fact it is not.
In order to access their version of the Machine, Sam and Olivia later recovered an ancient box which reputedly held the "Crowbar", but actually contained a drawing of Olivia in the same style as the drawing of Peter, revealing that Olivia is the "Crowbar". Her telekinesis is revealed to be able to allow her to briefly open the force-field, which she does in order to allow Peter to enter it.
Once Peter enters it, he has a vision of 2026. In this timeline, Peter's use of the Machine caused the destruction of the alternate universe, but did nothing to halt the decay of the prime universe, which is now decaying at much the same rate its double had been fifteen years previously. This vision allows Peter to realize the true nature of the Machine, and he uses it to merge the two rooms holding both Machines into one, creating a bridge between the prime and alternate universes, so that travel can be much more simple between the two, hoping that they can work together to save their prospective worlds. However, afterwards Peter is erased from existence by the Observers due to the fact that he served his purpose.
Despite the fact that this action created an alternate timeline, the bridge remains opens for most of season four until the two universes are forced to close it due to David Robert Jones trying to use it to destroy them both.
The First People are a mythos introduced in the third season episode "6955 kHz". They describe what Walter and other characters on the show believe to be a race of intelligent beings that existed before the mass extinction event, responsible for the construction of the Machine. In the prime universe, an ancestor of Sam Weiss (played by Kevin Corrigan), Samuel Wise I, in the late 1800s discovered the manuscript which gave clues about the First People and the Machine, which he had published in several different languages under pseudonyms that were anagrams of his name, such as "Seamus Wiles". However, Samuel Wise I left out a key element of the manuscript, which gave more details of the machine, and included the location of an object known as the "Crowbar", which could be used to penetrate the machine's defenses once Peter entered it. William Bell had collected the five First People texts and recognized Sam Weiss as the descendant of the author, and requested Nina Sharp to treat him as a special adviser in these matters.
In "The Day We Died", it is revealed that the First People are nothing more than a future version of Walter and some others including Astrid and Ella, having sent the deconstructed Machine through a wormhole in New York City to the far-distant past. He further left sufficient clues—the coordinates of the Machine locations via the numbers stations, and the drawings of Peter and Olivia—for the Machine and its operation to be discovered in a bootstrap paradox. In "The Day We Died", the future Walter ensures that the Machine is loaded with a vision of their grim future that Peter in the past will experience, allowing Peter to make a different choice.
The alternate timeline
In creating the bridge to connect the two universes with the Machine, Peter promptly vanished, with neither Olivia, Walter, nor their doppelgangers aware of Peter's absence. According to the Observers, he was erased himself from time and no longer existed; based on their discussion in the fourth season episode "Neither Here Nor There", he died as a child in both universes in this new timeline. In "Alone in the World", Walter describes that he still attempted to cross over to save the other universe's Peter, only to have him drown in Reiden Lake upon their return; "Making Angels" indicating that September did try to rescue Peter but failed to save the boy. Despite this, brief, ghostly images of Peter appear, and the Observers believe they must eradicate any memory of him from the timeline. However, September does not fully erase the traces of Peter that are showing up due to Olivia and Walter's love for him being too great for him to be completely forgotten. In "Subject 9", Olivia and Walter's actions cause Peter to reappear, surfacing in Reiden Lake; Peter is the only one that recalls the original timeline, and must work to rebuild the relationships he had in the new timeline.
When Olivia is dosed with cortexiphan, combined with her love for Peter, she is able to remember the original timeline and once again form a bond with Peter. According to September, she is the original Olivia and every one in this new timeline is really the person from the original timeline. Peter did not enter a different timeline, but he was erased and then thrown back into the one which he had been erased from. September also says that Peter had to be erased because of the events he (September) set into motion when he distracted Walternate. Peter was never supposed to be taken by Walter and the two universes were never supposed to go to war so it was necessary for Peter to be erased to create the correct timeline.
The alternate timeline has given the producers the ability to revisit past events from earlier episodes, demonstrating how certain events still occurred but without the influence of Peter. The producers, Jeff Pinkner & Joel Wyman, state that Walter crossing to try to save the parallel version of Peter still initiated the war between the universes. "Neither Here Nor There" also shows that Olivia is responsible for helping to release Walter from the mental institution, instead of Peter; however, without Peter, Walter has become recluse and refused to leave the laboratory. Other differences in the new timeline include: Olivia running away from the Cortexiphan trials instead of being brought out by Peter ("Subject 13"), later shooting and killing her abusive stepfather; Olivia being abducted by the parallel universe instead of crossing over on her own to rescue Peter, thereby allowing Fauxlivia to take her place in the prime universe ("Over There"); Colonel Broyles in the parallel universe is still alive instead of having died while protecting Olivia's escape from the parallel universe ("Entrada"); and Fauxlivia is still living with her boyfriend Frank who had originally left her after discovering her being pregnant with Peter's child ("Immortality"). Furthermore, without Peter, David Robert Jones had successfully escaped into the parallel universe ("There's More Than One of Everything"), later appearing to cause havoc in both universes. ("Back to Where You've Never Been")
The Observers are hairless pale men that typically wear grey suits and fedora hats. They are quiet, tending to mind their own business and interact only minimally with others. Appearing in every episode, they tend to appear before significant events in history. They use advanced equipment, such as advanced communication devices and compact binoculars, and they employ an alien written alphabet. A distinguishing trait is their diminished sense of taste, and it is often shown that they can only taste very spicy food. Observers also have diminished emotions.
The Observers are able to predict future events, and they are able to travel in time and across universes without difficulty because of their advanced technology. In "The End of All Things", it is revealed that the group of Observers seen in the first four seasons are a team of scientists from the far future, or at least from one of humanity's many possible futures. This group of Observers traveled to their past to observe the events that led to their creation.
The group of Observers seen in the show during the first four seasons had designated code names, with each individual referred to as a month of the year: September (Michael Cerveris) appears in every episode in the first four seasons, even if only in a cameo shot, while December (Eugene Lipinski) and others appear with less frequency. One episode, "August" dealt with a rogue Observer named August (Peter Woodward) who sought to try to change the fate of a young woman contrary to the Observers' practice.
September is seen in both universes during the episode "Peter", both to cause Walternate to miss a critical observation for the cure for Peter's illness in the parallel universe, and to rescue Walter and Peter after they fell through the ice in the prime one.
The episode "The Firefly" involves a series of events temporally engineered by September to force Walter to make a choice regarding Peter's safety as to prepare him for a future event. These events included bringing the son of Walter's favorite musician into the present to draw Walter's attention.
After Peter's disappearance in the third season's finale, "The Day We Died", the Observers remain aware that Peter has vanished, claiming he has been erased from existence.
The episode "Letters of Transit" reveals that the Observers wreaked environmental havoc on the Earth in the far future. The Observers then decided to travel back in time to the year and colonize the planet before the environmental destruction occurred. In the year 2015, the Observers invaded from the future, instituting "The Purge" and killing many humans. Although humans continued to resist well into the year 2036, the Observers largely succeeded in conquering the planet. The fifth season focuses on events in this future, where the Observers, run by Captain Windmark, maintain control on the remaining humans through their own abilities and the assistance of human Loyalists. A rogue group of humans, the Resistance, fight against the Observers, and have come to learn much about the Observers' abilities, including that many extend from an implant in the back of their neck that expands their mental processing power at the cost of emotions.
In the episode "The Boy Must Live", September explains that the final emotionless version of the Observers were "born" out of an experiment performed by a Norwegian scientist in 2167. That scientist was the first scientist to replace space in the brain usually designated for negative human emotions, such as rage, with brain cells tuned to increase intellect. Many generations of humanity later, brain cells currently tuned for emotions (not just the bad ones but the good ones as well) were engineered to be intellectual brain cells. Higher and higher intelligence was the ultimate goal.
The experimenter modified human genes to displace certain emotional facilities for improved mental abilities, and the success of the experiment eventually led to the development of near-emotionless humans with high levels of intelligence that became humanity's evolutionary future - aka "the Observers." Without emotions, there was no urge to procreate, and thus the Observers developed technology to artificially grow new Observers using Observer DNA via maturation chambers.
During the out of body growth process, Observers were grown from embryo into fully matured adults. Sometimes, the growth process would create genetic anomalies; typically, the Observers would destroy any anomalies. The Observer September encountered one such anomaly - Anomaly XB-6783746 - and was affected when he learned he was the "genetic parent." September did not destroy his progeny but developed a strong desire to save his son - Anomaly XB-6783746 - after scans revealed that the Observer was even smarter than mature Observers while possessing all of the emotions sacrificed so easily starting in 2167. His son, later named "Michael" by human caretakers during the initial Earth invasion by the Observers- possessed both human emotions and Observer-level intelligence. September then hid the child in the early 21st century (which was humanity's future but centuries before September's time). The series' finale concluded with Walter's successful effort to transport "Michael" to 2167 to convince the Norwegian scientists to abandon any efforts for reproductive medicine which might involve sacrificing emotions. These emotions are the backbone of humanity's conscience and moral compass and when humanity loses its collective moral compass in the pursuit of raw intelligence - we become the cold and calculating husks deemed "the Observers."
In the series finale, December explains that all twelve members of the science team had begun to experience varying degrees of human emotion, and that they had all agreed to keep these emerging emotions to themselves, in order to remain undetected by the other Observers in the future. They were also unaware that their mission of observation was also a precursor to the invasion that would see the Observers take over in 2015.
Introduced in the first episode of the fifth season, it is revealed that Walter had worked with September on a plan that would defeat the Observers. The plan involved several elements, which Walter hid in various locations, and then created a series of video recordings on Betamax tapes that would instruct his future self or another viewer on where to find these elements. Shortly after the Observers' arrival, Walter scattered these tapes around his lab and then used amber to encase them, effectively hiding them from the Observers. He then had the memories of this plan scrambled in a way that could only be retrieved via the use of the "Transilience Thought Unifier Model-11" ("Transilience Thought Unifier Model-11"). This was to prevent the hostile Observers from reading the plan from his mind.
When Walter is revived in 2036, he was found to have suffered mental damage and memory loss. Etta Bishop helps to regenerate Walter's brain with pieces that were previously removed by William Bell and stored at Massive Dynamics ("Letters of Transit", "Brave New World"). After recovering Peter, Olivia, and Astrid, Walter is captured, and though Windmark tries to probe Walter to extract the plan, the intense scan instead destroys that part of Walter's brain; though the Observers do not have the plan, neither does the Fringe team. However, considering Walter's habits of documentation, the Fringe team sneaks into Harvard, now converted to an Observer base, and discover that some of the tapes are embedded in the ambered part of the lab. They carefully and slowly extract each tape, and follow the directions to recover the items cited, during which they come to learn that Walter was aided by an unseen figured named "Donald".
One element of the plan leads them to the Observer child (previously seen in "Inner Child"), named Michael by his surrogate parents, who lacks the Observer implant. After some difficulty in trying to communicate with Michael, Michael provides Walter a vision, where it is revealed that "Donald" is really September. September is located - having his Observer implant stripped and undergone a "biological reversion" to become a normal human - and he explains that with the components they have collected, the plan would be to send Michael into the future of 2167, hoping that the researchers working on the gene program would see that it is possible to possess both emotion and intelligence, and put an end to the experiment. This in turn would erase the existence of Observers from time, and as postulated by September, reset time from the point when observers invaded.
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