Fringe

In the series premiere, FBI Special Agent Olivia Dunham (ANNA TORV) investigates a fatal international flight, recruiting Dr. Walter Bishop (JOHN NOBLE) and his son (JOSHUA JACKSON) to help.

The unlikely trio's strange partnership begins as they investigate the mysterious death of a woman who conceives, carries to full term and then births a baby in the span of hours and her baby, who ages 80 years in a matter of minutes. As the bizarre and seemingly unexplainable occurrences are explored, quirky Dr. Bishop runs extensive testing in the lab; his reluctant son, Peter, endures his new role as his father's keeper; and Olivia turns to Massive Dynamic Chief Operating Officer Nina Sharp for assistance.

Further exploring the blurring line between the possible and the unimaginable, our unlikely trio investigates a horrific bus incident in which the dead bodies of commuters are frozen inside a bus like insects in amber. Led by the unconventional Dr. Bishop, who requests a piano in the lab to help him process data, the team uncovers a man who has visions of Pattern-related disturbances before they happen and race to decipher the distraught mans thoughts to prevent another atrocious event from occurring.

After a deadly explosion rocks a construction site in New York City, Broyles solicits the aid of our unlikely threesome to investigate a strange cylinder mysteriously found at the scene and completely unharmed by the surrounding devastation. After Olivia uncovers an unbelievable commonality between disturbing events, Dr. Bishop takes matters into his own hands and Peter is forced into field duty, it almost seems as if the untraceable object is triggering the series of odd behaviors, unexpected events and surprising revelations in "The Arrival."

When its discovered that a rather simple man has the ability to harness electricity, dangerous and deadly occurrences follow, and our unlikely trio investigates this super-charged oddity. Meanwhile, Olivia has a high-voltage encounter of a different kind when she is rocked by a blast from her past, and Dr. Bishop turns to his feathered friends and enlists homing pigeons to help him break the case.

When a woman with a rare disease inexplicably causes excruciating pain and subsequent death to those she encounters, the circumstances point to illegal drug trials... or worse.

When a strange parasite attaches itself to the internal organs of a dying agent, Agent Dunham rushes to Germany to meet with a prisoner who reveals details of a much larger threat.

When a music prodigy is kidnapped, its discovered that a sequence of flashing lights appeared at the abduction which Walter links back to his bunkmate at St. Claires Hospital.

While investigating a mystifying incident at Massive Dynamic, Olivia seeks to rid her consciousness of Agent Scott and Peters past catches up with him.

While investigating a series of extraordinary bank robberies that defy the laws of physics, Walter realizes that the high-tech thieves are after something of his.

After shifty FBI Agent Loeb orchestrated Mr. Joness otherworldly escape from a German prison and Olivias alarming abduction, indications of a larger threat begin to emerge.

A computer scientist-turned-serial killer has discovered an unconventional method of killing people by liquefying their brains.

When another mysterious virus emerges aboard an international flight, leaving freakish remains, Peter & Olivia are forced to go undercover to investigate the latest bizarre threat.

German agents question Olivia when Mr. Jones returns and a lethal toxin is released that causes victims to die without faces as their orifices suddenly and mysteriously close up.

The FBI's Fringe Division investigates a mysterious, mute boy with an unspoken connection to Agent Olivia Dunham. Meanwhile, a gruesome serial killer resurfaces.

As animal rights activists ransack a laboratory, they get more than they bargained for when one of the caged "animals" unleashes a ferocious appetite. Leaving grotesquely mutilated dead bodies in its wake, the scientifically engineered beast -- with the body of a lion, claws of an eagle, fangs of a viper, skin of a rhinoceros and tail of a serpent -- attacks Charlie (series star KIRK ACEVEDO). With Charlie's life on the line, Walter must come face-to-face with both his past and the beast.

As a suicide incident occurs at New York's iconic Grand Central station, Agent Dunham simultaneously witnesses the event while asleep and dreaming in Boston. Rattled by the extraordinary and coincidental circumstances, Olivia, Peter and Walter investigate further, but keep coming up empty-handed. As these violent occurrences continue and worsen, Olivia is sent into an unthinkable direction and shocking details emerge about the ZFT manuscript, the highly experimental drug Cortexiphan and Olivia's childhood.

The Fringe Division is on the case when severely mutilated bodies drained of spinal cord fluid begin to pile up. After their investigation leads them to a scientist (guest star JEFFERSON MAYS) with possible ties to the Z.F.T. bioterrorist cell, they are shocked to discover the identity and motive of the killer. When the kills occur with increasing frequency, Olivia, Peter and Walter go to desperate lengths to stop them.

Olivia experiences "awake dreams," seeing elaborate visions of things not really there. While investigating a disturbing case of a woman who apparently spontaneously combusted, Olivia throws caution to the wind and explores her unexplained visions further. Meanwhile, Walter discusses key information about the Z.F.T. manifesto -- and Peter reveals a secret that yields unexpected results in the case.

Setting the stage for the dramatic and revealing first season finale are a sudden and unexpected attack on someone with close ties to Fringe Division, the return of bioterrorist David Robert Jones (guest star JARED HARRIS) and the inexplicable disappearance of Walter. Find out more about the mysterious events surrounding our trio when questions are answered, observations made, loyalties are tested and the elusive William Bell (guest star LEONARD NIMOY) is finally introduced.

Season Two opens with Olivia's shocking return to this perplexing alternate reality, while Peter, unknowingly in a race against time with an ominous mobile force, pursues information about Olivia's visit. Walter reenters the lab to cook up a bit of fringe science -- and of course, some custard for Peter's birthday!

As the circumstances surrounding Olivia intensify, the Fringe team investigates a perplexing case involving genetic mutation. A highway construction worker in rural Pennsylvania goes missing when he is mysteriously drawn into an underground tunnel filled with human remains. Meanwhile, back in the lab, Walter is attempting to simulate travel between realities on frogs. When it's discovered that the disappearance in Pennsylvania is not an isolated incident, the Fringe team travels to the crime scene to unearth evidence.

Peter, Walter, Olivia and Broyles pursue a strange and deadly occurrence in Philadelphia where a bomb blew up inside a train station but left no trace of any explosive device. The perplexing and unexplained set of circumstances returns Walter to the lab to closely examine the human remains where he uncovers an unlikely energy source that triggered the explosion. With the explosive threat of more bombs and links to a classified military project, the intense investigation leads Olivia and Peter to Iraq.

Recuperating from the traumatic and alarming meeting with Massive Dynamic founder William Bell (guest star LEONARD NIMOY), Olivia consumes a powerful "fringe" concoction that Dr. Bishop prescribes to stimulate her memory. Meanwhile, the Fringe Division investigates a series of robbery cases that are tied to shape-shifting. As clues are tracked and memories are jogged, another woman experimented on by Dr. Bishop is introduced and a flashback reveals more about Olivia's visit to the alternate reality.

The Fringe team travels cross-country to Seattle after learning of a mysterious incident involving a man who attacked his boss because he believed he was an evil ram-horned creature. As these puzzling occurrences continue, the team tirelessly explores strange and creepy links to dreams. In pursuit of additional information, Agent Broyles has a disconcerting meeting with enigmatic Massive Dynamic executive Nina Sharp that leads the investigation in an unthinkable direction.

The Fringe Division is flummoxed by dark circumstances and new light is shed on Agent Broyles as the Fringe team takes on a puzzling investigation where victims are inexplicably disintegrating into ash. The shadowy case casts light on Special Agent Phillip Broyles' past and leads the team to the possibility of a foreign Fringe Science. Emotions run high as the alarming events stack up and revealing personal details emerge about the leader of the Fringe Division.

When a kidnapping rapidly escalates into a hostage situation in New York, local authorities close in on the suspects only to discover a mysterious force with mind-blowing consequences. As the investigation intensifies, the mystery and threats deepen to unimaginable proportions when the Fringe Division discovers a link between the kidnapping and Massive Dynamic.

There's more than one Observer! When one of the series' mysterious Observers kidnaps a woman, the Fringe team is called in to investigate why. But while the course of their investigation not only reveals the private lives of the Observers, it also threatens to unearth Walter's clandestine involvement with them years before -- a secret he's desperate to keep from his son, Peter. As destiny is irrevocably rewritten and time is running out, the renegade Observer asks for help from the unlikeliest of sources...Walter Bishop.

After a cargo ship runs aground, the shoreline becomes littered with bodies hosting a giant squid-like creature. The Fringe team descends upon the scene to examine the bodies and discovers that the mysterious organisms are actually giant parasites. As the investigation unfolds, Walter heads back to the lab -- while Olivia, Peter and Broyles race against time when they realize the case has ties to a threatening organization.

A Fringe investigation is triggered when a patient at a mental institution undergoes an impromptu brain surgery that unexpectedly leaves his brain exposed. Despite the unthinkable circumstances, the patient's condition and sanity miraculously improves before the Fringe team arrives. While Agent Dunham and Peter scan surveillance tapes (and Walter enjoys his pudding), Olivia recognizes a familiar face as Thomas Jerome Newton (guest star SEBASTIAN ROCHE), the leader of the "shape-shifters." As similar cases stack up, the Fringe team heads back to the lab to determine exactly how patients are being cured. Walter's brains are put to the test and William Bell (guest star LEONARD NIMOY) resurfaces.

After a teenage girl is pronounced brain dead, her mother takes her off life support, but when doctors operate quickly to remove her organs, the deceased girl shockingly awakens screaming an alphanumeric code. Equally as perplexing as her resurrection is that she is now somehow able to speak Russian and possesses classified information only a high-ranking soldier would know. While the girl's mind-bending condition intensifies, Walter dusts off some old lab videos and hypothesizes the unthinkable, sending Olivia and Peter to investigate the bewildering case in an original "Unearthed" episode of FRINGE -- and here's another mystery: is it an unaired episode from Season One or is it from an alternate universe?

Following an unexplained attack involving disfigured humans, the Fringe team visits Edina City, a small town in upstate New York, to uncover leads surrounding the bizarre case. When it's determined that these disfigured people have managed to hide themselves for a while and they'll do just about anything to keep it that way, the investigation takes an unexpected turn.

When a man enters an office in Boston for a meeting, he becomes disoriented and collapses, only to have his veins erupt and spray blood everywhere. Shortly after Olivia and Peter arrive at the scene to investigate the bizarre case, it's discovered that a lethal virus -- with deep ties to something very valuable -- is spreading, so the CDC moves in to quarantine the building and eradicate the pathogens. Isolated inside with the rest of the exposed office employees, Peter and Olivia face life-threatening circumstances, sending Walter, Broyles and Astrid on a frantic search for a solution to save them.

When a specific group of guests at a wedding in Brookline, Massachussetts, suffocate from the inside out, the upsetting and disconcerting crime scene has the Fringe team investigating how the toxin was delivered and targeted. As evidence is taken into the lab, it's discovered that the wedding ceremony was a testing ground for a weaponized science experiment. Adding to the intense lab investigation, Walter uncovers an alarming formula that reveals a link to a branch on the Bishop family tree. With the escalating threat of more deadly attacks and unexpected familial ties to the case, the Fringe team stops at nothing to prevent further catastrophic events.

After a violent tremor shakes a Manhattan office building to its core, only one survivor is found, leading the Fringe Team to believe he is not from this reality. Walter surmises that what shook the building was not geologic, but rather something discovered in his research with William Bell many years ago. With another catastrophe imminent, the team races to Jacksonville -- the site of Walter and William's experiments, to help Olivia reconnect with her past in an effort to save hundreds of people from certain death.

While explaining Peter's otherworldly origins to Olivia, Walter flashes back to 1985 and the mystery springs forward by revealing the past. Also, Peter's mother (guest star ORLA BRADY) is introduced -- and details of the neighboring world reaffirm that there is definitely more than one of everything.

When a perfectly healthy woman is found dead from a disease she never had, the Fringe team investigates the origin of this inexplicably fatal condition before it claims more innocent victims. Meanwhile, Olivia struggles to keep Walter's secret from Peter -- and her loyalty to Peter is tested as time goes on.

When passengers aboard a commuter train appear to have died a still death, it seems that a switch was flipped -- because all cell phones, MP3 players, laptops, batteries and human bodies have been drained of power. As the Fringe team assembles at the bizarre crime scene, Peter remains suspicious that something is amiss with Walter, who is struggling to keep the unimaginable a secret. When the investigation leads them to Alistair Peck (guest star PETER WELLER), a very powerful man who has tremendous energy with severe consequences, an ironic set of circumstances surface.

When two teenagers on a date turn up "dead" at an abandoned warehouse with the three puncture wounds to the soft palate -- a trademark of the alternate world's shape-shifters -- the Fringe team investigates the evidence as well as the motives of mastermind Thomas Jerome Newton (guest star SEBASTIAN ROCHE). Upon discovering a shape-shifting embryo, Walter returns to the lab to conduct further analysis -- and Olivia and Peter head to Massive Dynamic for answers. Meanwhile, Peter reveals a family secret to Olivia as Walter struggles to recall what Newton knows about "building a door."

Singing and dancing occur when Walter explores his mind! While Walter deals with some very upsetting news -- he tells Olivia's niece, Ella (guest star LILY PILBLAD), a fairy tale that includes musical performances by Olivia and Agent Broyles.

Peter teams up with a local law enforcement official, Sheriff Mathis (guest star MARTHA PLIMPTON), on a serial murder investigation with ties to Thomas Jerome Newton (guest star SEBASTIAN ROCHÉ). Meanwhile, Walter copes with the possibility of being sent back to St. Claire's -- and someone from the "other side" pays a visit.

In the first of a two-part, two-night second season finale, Walter and Olivia travel to the parallel universe, and the anticipated face-off between Walter Bishop and William Bell occurs when special guest star LEONARD NIMOY returns.

In the second of a two-part season finale, sacrifices will be made and both universes may never be the same again after Walter and Olivia visit the "other side."

At the conclusion of last season, a distraught Peter returned to his otherworldly origins to reconnect with his roots and his birth mother (guest star ORLA BRADY). When the Fringe Team mobilized to retrieve Peter, it was seen as an attack on the alternate universe and led to an intense situation with Walter and Olivia pitted against their doppelgangers in a race against time. William Bell made the ultimate sacrifice that paved the way for Peter to return "over here" with Walter and a disguised alternate Olivia at his side. This extraordinary turn of events shockingly left an imprisoned Olivia "over there." The quest to retrieve Peter from the parallel universe will raise questions about identity and choices next season. In the Season Three premiere, a disoriented Olivia fights to find her way home, and we are introduced to her mother, Marilyn (guest star AMY MADIGAN). Meanwhile, Peter and Walter try to move on with their lives -- unknowingly alongside the alternate Olivia.

Alternating the story back to "over here," the Fringe Team investigates a mystifying case where people are discovered in a trancelike state that ultimately leads to their death. The unlikely suspect: a mysterious box. As Peter and Walter collaborate to study its properties, alternate Olivia presses on and turns up the heat on an unsuspecting Peter. Meanwhile, key information about the future is revealed when Walter and Nina meet at Massive Dynamic for the emotional reading of the last will and testament of William Bell.

In this case, timing is everything as a series of anomalous events lead the Fringe Division to investigate deadly incidents with unimaginable coincidences. As the freaky crimes continue to occur, the team is in a race against time to protect potential victims. Meanwhile, Secretary Bishop shares his strategic plan with Colonel Broyles as Olivia grapples with a heart-stopping vision.

Concerned about the consequences of a distressing development involving a high-ranking official, Newton is forced to call to action a sleeping shapeshifter. As Walter and the rest of the team gather evidence, they move the investigation to Massive Dynamic, where Olivia goes on high alert and Walter finds himself in a perilous situation.

The alternate universe Fringe Division investigates a shocking breach of security when a twin frees his brother (guest stars SHAWN and AARON ASHMORE) from a quarantined Amber area. As the team sets out to crack this sophisticated case, Walternate experiments more with Olivia as she reenters the tank. Meanwhile, visions of Peter continue to haunt Olivia about returning to the "other side."

Back "over here," the Fringe Division investigates a bizarre phenomenon when 15 people up and down the Eastern Seaboard, all suffer retrograde amnesia from listening to their shortwave radios on the same frequency. Much to Walter's dismay, Peter presses on with piecing together the mass destruction device. Just as alternate Olivia and Peter's chemistry deepens, the anticipation of Olivia's return escalates.

When a serial kidnapper "over there" strikes again, the emotional and familiar case hits home for Colonel Broyles, sending a determined Olivia to uncover additional details about the abductions. In the meantime, Olivia fights on and reunites with Henry (guest star ANDRE ROYO) to enlist his services on an intense and covert mission to return home.

Peter grapples with the aftermath of recent events as Olivia desperately searches for an ally. Meanwhile, the Fringe Team discovers a critical device that communicates between universes.

When the Fringe Team investigates a case where a victim had his heart extracted, it's just the beginning of a series of mysterious and reanimating events tied together. Meanwhile, Peter comes to terms with the reality of his relationship with Olivia.

In the midseason premiere episode, an Observer makes contact with the Fringe Team to help rectify a mistake. Meanwhile, Walter befriends Roscoe Joyce (guest star CHRISTOPHER LLOYD), one of his musical heroes and keyboardist for Walter's favorite 1970s band, "Violet Sedan Chair." Learning the real reason the band broke up, Walter realizes that their lives overlap in strange and unexpected ways -- even though they've never met before.

Two incidents trigger one massive investigation! When the Fringe Team visits Massive Dynamic's assembly of doomsday device, Walter becomes greatly concerned for Peter's wellbeing -- so he turns to Nina for added brainpower to understand the relationship between Peter and the superweapon. Meanwhile, the discovery of a dead body triggers an intense investigation.

When a scientist falls dead after ingesting a lethal cloud of blue powder and his bones disintegrate in his body, the CDC suspects a biological attack. As the Fringe Team investigates further, a subject from Walter's past with ties to Olivia reluctantly agrees to assist with the intense case.

As the story shifts back to life "over there," the absence of Colonel Broyles shifts the dynamic of the Fringe Team as they investigate a bioterrorist armed with an insect that has a taste for human flesh. Meanwhile, alternate Olivia is reunited with her beau, and Walternate remains determined to save his world but discovers there are certain lines he will not cross.

A series of Fringe events leads the team to the home of a woman grieving over the death of her husband, while Peter and Olivia make an effort to repair the emotional rift between them.

The team revisits the past in this follow-up to last season's "Peter" flashback episode that reveals a poignant period of time for both the Bishops and Olivia.

What goes up may not always come down when the Fringe Team investigates a group of thieves who can break the laws of gravity. Meanwhile, Walter attempts to delay the damage he's caused to the fabric of the universe.

Answers lead to new questions when the Fringe team investigates an apparent suicide victim. Uncovering a second set of fingerprints, they are led to a woman with uncanny characteristics that cannot die.

The intensity of life "over there" accelerates as Olivia finds herself in mortal danger.

Using some mind-bending lab experimentation, the team makes a desperate attempt to remove William Bell's consciousness from Olivia's body before she's lost forever.

The beginning of the end is triggered when Walternate finds a way to wreak havoc "over here" -- putting both universes in jeopardy.

Olivia joins forces with the mysterious Sam Weiss (guest star KEVIN CORRIGAN) in a desperate race against time.

As the thrilling third season propels itself to its climactic close, questions will be answered as Peter confronts his destiny and a beloved team member meets an untimely demise.

The Fringe Team takes new shape as the impact of Peter's heroic choice unfolds in the fourth season premiere. Just one week after Peter Bishop saved the day and was then wiped from existence, the truce between the two worlds remains intact and the two sides are forced to work together. Lincoln Lee (series star SETH GABEL) joins the Fringe team as they investigate a shapeshifter case that is very personal to him.

As the victims of a highly intelligent serial killer "Over There" stack up, the Fringe Division "Over Here" is asked to assist. As the two sides tangle and innocent people remain at risk, the suspect's doppelganger "Over Here," a professor who teaches Forensic Psychology, is brought into the fold and forces the team to consider the notion of sending civilians to the other side.

When two 12-year-old kids bully another boy, they are found dead...and in just hours after dying, their bodies are shockingly in an advanced state of decomposition. As the Fringe team investigates the mysterious case, they uncover an amorphous figure claiming more victims. Meanwhile, Walter becomes increasingly distracted by his hallucinations.

Olivia uncovers a dangerous force that may be connected to Walter's past experiments with the drug Cortexiphan. Their investigation forces Walter to leave the lab for the first time in years as he and Olivia head to Massive Dynamic in New York to examine old case files. Walter struggles with life outside the lab as he comes face-to-face with the demons of his past.

Some things are not meant to be tampered with. In the aftermath of recent shocking events, things really escalate when the translucent shapeshifters return. As the threat and circumstances intensify, a former Massive Dynamic scientist Malcolm Truss (guest star ARYE GROSS) enters the fold. Meanwhile, Nina Sharp pays Walter a visit in the lab.

The Fringe team must find the pattern between tragic time loop anomalies. As the investigation unfolds, Raymond (guest star STEPHEN ROOT), an electrical engineer, and his wife Kate (guest star ROMY ROSEMONT), a professor of theoretical physics, enter the picture and time becomes a matter of life and death.

When a man mysteriously dies by an invisible force, his body rapidly begins turning ghostly white. The Fringe team learns that this is not an isolated incident, and there's evidence that links the predator to someone who passed away with an unknown genetic disorder. Meanwhile, Olivia suffers from mysterious migraines.

The time has come to choose a side. In an effort to find a way home, Peter journeys to the Other Side to confront Walternate -- a venture that proves more dangerous than expected. Meanwhile, Olivia receives a dire premonition from an Observer.

Peter's visit to the Other Side intensifies as the alternate Fringe division faces off against a formidable new foe in a harrowing race against time.

Olivia continues to cope with the ominous warning from the Observers, while Peter and the team track a girl with the mysterious ability to see the future and predict death.

Our Astrid gets an unexpected visit from her Alternate, while Peter and Olivia track a killer using a toxin that has yet to be invented. Both universes collide in a case that pushes the boundaries of what is possible.

Peter, Olivia and Walter come face-to-face with a mysterious and terrifying Fringe event as they become trapped in a town there's no escaping from.

As the Fringe team investigates a mentally ill patient who appears to be connected to a series of murders, frightening clues and connections are uncovered that lead Olivia to some shocking revelations.

Peter and the Fringe team take extraordinary measures in an attempt to stop life-threatening events from unfolding.

Following the recent shocking revelations and emotional events, Peter weighs his options as the Fringe team investigates a killer targeting love.

The Fringe team faces a case that appears familiar to Peter. Strangely, it takes place in this world.

Lincoln travels to the other side to join forces with Bolivia and his own alternate, as they search for a vigilante with a surprising connection to the shapeshifters.

Walter travels to the Alternate Universe to assist in the investigation of a Fringe event with ties to both worlds. Meanwhile, David Robert Jones reveals his next target.

The Fringe tradition of a mind-bending 19th episode continues as the Fringe team goes back to the future. Jumping ahead to 2036, the Fringe team and the Observers engage in a game-changing battle.

The Fringe teams on both sides fight for a common cause as the Cortexiphan children surface with some shocking new developments.

A mysterious Fringe event, causing people to spontaneously combust, forces Walter to revisit his painful past while the Fringe team faces off against David Robert Jones to save the world -- or worlds.

In the climactic conclusion of the two-part Season Four finale, the Fringe team is pushed to their breaking point as they desperately attempt to prevent a catastrophic event that threatens the lives of everyone.In the climactic conclusion of the two-part Season Four finale, the Fringe team is pushed to their breaking point as they desperately attempt to prevent a catastrophic event that threatens the lives of everyone.

The fifth and final season picks up from the ominous events of last season's "Letters of Transit" episode, in which the year is 2036 and the overpowering Observers rule. The Fringe team -- preserved in amber for 20 years -- is now a rebel resistance team fighting for freedom. Peter, reunited with his now adult daughter, Henrietta (guest star GEORGINA HAIG), sets out to find out what happened to his wife and Etta's mom -- Olivia -- as they launch their mission to free their world from the Observers in the fifth and final season premiere.

The fight for freedom intensifies when the Fringe team revisits Walter's Harvard lab -- now under Observer control -- in an attempt to locate the information they need to fight on in their mission to save the world.

As the rogue Fringe team continues to fight off the oppressive Observers' invasion, unforeseen events lead them into a forest where they encounter a strange subculture of people devoted to recording human history.

When the Fringe Team tracks a lead into a hostile and heavily guarded location, Phillip Broyles (series star LANCE REDDICK) resurfaces...but can he be trusted? Pivotal and emotional events unfold.

The Fringe Team responds to recent devastating events by going on the offensive, while one of the key members makes a pivotal and shocking move.

Walter follows leads to a key piece needed to defeat the Observers, while a member of the Fringe team takes on a new role.

As the fight for the future intensifies, a member of the Fringe team orchestrates a game-changing Fringe event of his own.

Olivia encounters a very intuitive and oracle-like person named Simone (guest star JILL SCOTT -- Steel Magnolias) as she looks to recover a key piece of equipment for Walter. Meanwhile, Peter finds himself in a perilous situation as he observes Windmark.

In an attempt to recall his plan to defeat the Observers, Walter takes an LSD trip down memory lane in search of answers. Meanwhile, Peter and Olivia trace a mysterious signal into the woods, where they come upon a grisly scene.

As the countdown to the climactic series finale continues, the Fringe team is running out of time to save the world. As Peter, Olivia, Astrid and Walter scramble to tap into a key piece of the puzzle to defeat the Observers, they enlist the aid of Nina Sharp who conjures up a plan.

As time dramatically ticks down toward the end of this acclaimed series, Peter, Olivia and Walter stop at nothing to save the universe from Observer rule. Walter enters the infamous deprivation tank in an attempt to uncover a key piece of information about the mysterious figure, Donald. Meanwhile, Captain Windmark sets out on a revealing mission of his own as long-standing questions are answered.

The acclaimed series that has explored the human condition through the prism of parallel universes, unexplainable phenomena and unimaginable threats, nears its epic and climatic conclusion. First, the Fringe team engages a desperate plan as Olivia embarks on a dangerous and otherworldly journey into the unknown. The five-season saga nears its epic and emotional end in the first part of a special two-hour series finale episode.

The acclaimed series that has explored the human condition through the prism of parallel universes, unexplainable phenomena and unimaginable threats, reaches a milestone 100th episode and its epic and climatic conclusion. After Olivia's dangerous and otherworldly journey into the unknown, she, Peter, Walter, Astrid and Broyles face off against the Observers in one final and extraordinary battle for the fate of mankind. The five-season saga comes to an epic and emotional end in the exciting conclusion of a special two-hour series finale episode.