Walter explains Peter's otherworldly origins.

Peter

Drama

While explaining Peter's otherworldly origins to Olivia, Walter flashes back to 1985 and the mystery springs forward by revealing the past.

Fringe

An FBI agent, a misfit scientist - the mindbending crime epic

An FBI agent, a misfit scientist - the mindbending crime epic. Agent Olivia Dunham needs all the help she can get in a world where thieves walk through walls.

fringe

Thriller stars Anna Torv, John Noble and Joshua Jackson.

Pilot

When an international flight lands at Boston's Logan Airport with no signs of life aboard, FBI Special Agent Olivia Dunham is called in to investigate as part of an interagency task force.

The trio investigates a wildly accelerated pregnancy.

The Same Old Story

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.

The trio uncovers a man with visions of future tragedies.

The Ghost Network

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.

A mysterious cylinder triggers odd behavior and revelations.

The Arrival

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.

Bishop investigates a man whose energy has deadly effects.

Power Hungry

When it's 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.

A radioactive woman causes pain and death to people she meets.

The Cure

After weeks of being reported missing, a woman with a rare disease resurfaces in suburban Massachusetts and inexplicably causes excruciating pain and subsequent death to those she encounters.

A deadly parasite has agents in a race against time.

In Which We Meet Mr. Jones

Every second counts when a strange, almost-otherworldly parasite mysteriously attaches itself to the internal organs of a dying FBI agent.

The power of music rings forth unforeseen forces.

The Equation

When a child music prodigy is abducted by a serial kidnapper, it's discovered that a sequence of flashing lights appeared at the abduction - which Walter links back to his bunkmate at St. Claire's Hospital.

Olivia and Peter revisit their past during an investigation.

The Dreamscape

A Massive Dynamic employee is so convinced he is being attacked by butterflies that he jumps out of a window to escape them, and the team is called in to investigate.

Extraordinary bank robberies unexpectedly link to Walter.

Safe

While investigating a series of bank robberies, Olivia, Walter and Peter are shocked to find one of the suspects inexplicably trapped inside a vault wall as if it solidified around him.

Olivia's abduction and an epidemic reveal more of the Pattern.

Bound

After shifty FBI Agent Mitchell Loeb orchestrated David Robert Jones' otherworldly escape from a German prison and Olivia's alarming abduction, indications of a larger threat begin to emerge.

The trio investigate a man who can liquefy brain matter.

The No Brainer

Olivia, Walter and Peter are called in to investigate the death of a car salesman who was found in a pool of "goo," exactly like another man across the country.

Olivia and Peter go undercover to study a mysterious virus.

The Transformation

When the Fringe Division delves into another bizarre occurrence aboard an international jumbo jet, freakish remains are discovered at the crash site.

Olivia is put to the test when Mr. Jones returns.

Ability

German agents question Olivia about her "relationship" with David Robert Jones, an escaped prisoner questioned months earlier now living in the U.S.

A mute boy forms a mysterious connection with Olivia.

Inner Child

Just seconds before a building is demolished, a mysterious mute child who has been living alone underground is discovered. When the FBI's Fringe Division investigates, the boy forms an unspoken connection with Agent Olivia Dunham.

Agent Francis faces off with some fringe wildlife.

Unleashed

As animal rights activists ransack a laboratory, they get more than they bargained for when one of the caged "animals" unleashes a ferocious appetite.

Olivia learns that her reality may be completely alterable.

Bad Dreams

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.

A killer thirst for spinal fluid leads to a larger threat.

Midnight

The Fringe Division is on the case when severely mutilated bodies drained of spinal cord fluid begin to pile up.

The Division investigates a case of spontaneous combustion.

The Road Not Taken

Olivia experiences "awake dreams," seeing elaborate visions of things not really there. While investigating a case of a woman who apparently spontaneously combusted, Olivia throws caution to the wind and explores her unexplained visions further.

Questions are finally answered in the first season finale.

There's More Than One of Everything

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 and the inexplicable disappearance of Walter.

A girl is resurrected in an unearthed episode from Season 1.

Unearthed

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.

New cases and endless possibilities emerge as the season opens.

A New Day in the Old Town

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.

The Fringe team investigates a case of genetic mutation.

Night of Desirable Objects

As the circumstances surrounding Olivia intensify, the Fringe team investigates a perplexing case involving genetic mutation.

The Fringe team investigates strange bombs in Philadelphia.

Fracture

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.

Olivia's murky past with William Bell materializes.

Momentum Deferred

Recuperating from the traumatic and alarming meeting with Massive Dynamic founder William Bell, Olivia consumes a powerful "fringe" concoction that Dr. Bishop prescribes to stimulate her memory.

Dreams bizarrely project nightmarish events.

Dream Logic

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.

A shadowy case casts light on Agent Broyles' past.

Earthling

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.

A disconcerting kidnapping has unforeseen consequences.

Of Human Action

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.

August

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.

A squirming piece of fringe science washes ashore.

Snakehead

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.

Walter's brains are put to the test and William Bell returns.

Grey Matters

A Fringe investigation is triggered when a patient at a mental institution undergoes an impromptu brain surgery that unexpectedly leaves his brain exposed.

The Fringe Team investigates a small-town cover-up.

Johari Window

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.

Peter and Olivia face a life-threatening virus.

What Lies Below

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.

A lethal toxin uncovers a secret in the Bishop Family.

The Bishop Revival

When a specific group of guests at a wedding in Brookline, Massachusetts, suffocate from the inside out, the upsetting and disconcerting crime scene has the Fringe team investigating how the toxin was delivered and targeted.

Two parallel worlds collide with disastrous results.

Jacksonville

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.

Olivia struggles to keep Walter's secret from Peter.

Olivia. In the Lab. With the Revolver.

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.

The Team studies a phenomenon that drains victims of power.

White Tulip

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.

The Shapeshifters return and so does Thomas Jerome Newton.

The Man from the Other Side

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.

Walter explores his mind with singing and dancing!

Brown Betty

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

Walter fears the possibility of being re-institutionalized!

Northwest Passage

Peter teams up with a local law enforcement official, Sheriff Mathis, on a serial murder investigatback to St. Claire's - and someone from the "other side" pays a visit.

The team ventures into the alternate world!

Over There

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.

Over There: Part 2

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."

Olivia fights to find her way home as the season opens.

Olivia

In the Season Three premiere, a disoriented Olivia fights to find her way home, and we are introduced to her mother, Marilyn. Meanwhile, Peter and Walter try to move on with their lives - unknowingly alongside the alternate Olivia.

Walter copes with the consequences of his choices.

The Box

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.

Timing is critical when deadly fringe events begin to occur.

The Plateau

In this case, timing is everything as a series of anomalous events lead the Fringe Division to investigate deadly incidents with unimaginable coincidences.

Newton is forced to call to action a sleeping shapeshifter.

Do Shapeshifters Dream of Electric Sheep?

Concerned about the consequences of a distressing development involving a high-ranking official, Newton is forced to call to action a sleeping shapeshifter.

The other Fringe team tracks an escape from an Amber area.

Amber 31422

The alternate universe Fringe Division investigates a shocking breach of security when a twin frees his brother from a quarantined Amber area.

The anticipation for Olivia's return escalates.

6955 kHz

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.

Olivia enlists the help of Henry to return home.

The Abducted...

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.

A device that communicates between universes is discovered.

Entrada

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.

Peter comes to terms with his relationship with Olivia.

Marionette

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.

An Observer contacts the Fringe Team for help.

The Firefly

In the midseason premiere episode, an Observer makes contact with the Fringe Team to help rectify a mistake. Meanwhile, Walter befriends Roscoe Joyce, one of his musical heroes and keyboardist for Walter's favorite 1970s band, "Violet Sedan Chair."

Two mysterious incidents trigger one massive investigation!

Reciprocity

Two incidents trigger one massive investigation! When the Fringe Team visits Massive Dynamic's assembly of the doomsday device, Walter becomes greatly concerned for Peter's wellbeing.

No bones about it, the Fringe Team takes on a lethal threat!

Concentrate And Ask Again

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.

The alternate team adjusts to life without Colonel Broyles!

Immortality

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.

Peter and Olivia try to repair the rift between them.

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.

Subject 13

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.

Walter tries to delay the universal damage he's done.

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.

The team investigates a woman that cannot die.

Stowaway

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.

Bloodline

The team tries to extract Bell's consciousness out of Olivia.

Lysergic Acid Diethylamide

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.

Walternate finds a way to wreak havoc "over here."

6:02 AM EST

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 in a desperate race against time.

The Last Sam Weiss

Destiny and demise collide on the season three finale!

The Day We Died

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 impact of Peter's choice unfolds in the season premiere.

Neither Here Nor There

The Fringe Team takes new shape as the impact of Peter's heroic choice unfolds in the fourth season premiere.

A serial killer forces the two Fringe teams to work together.

One Night in October

As the victims of a highly intelligent serial killer "Over There" stack up, the Fringe Division "Over Here" is asked to assist.

The team finds a Fringe figure connected to a creepy case.

Alone in the World

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.

Fringe

Series 2