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The Fringe team closes in on the mysterious Observer after they investigate a bizarre abduction case in Boston, MA.

The Fringe Division investigates an unusual kidnapping with connections to Massive Dynamic.

The Fringe team investigates instances of victims being transformed to ash by high-energy discharges, and discover a connection to Broyles' past.

A man attacks his boss after a disturbing dream and the team travels to Seattle to investigate. Meanwhile, Broyles needs to meet with Nina Sharp.

Agent Dunham, still recovering from her traumatic visit to the alternate reality, is given a concoction by Walter to help her remember. Another woman being experimented on by Walter is introduced. Meanwhile the Fringe team look into a series of robberies that are linked to shapeshifting.

Peter, Olivia, and Walter race against time to investigate the bombing of a train station. Walter discovers something unusual about the human remains.

The Fringe team travels to Pennsylvania to investigate an underground tunnel full of human remains. Meanwhile, Walter experiments using frogs to travel between realities.

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.

The 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 set the stage for a non-stop, nail-biting season finale. Questions will be answered, observations made, loyalties tested and truths and identities revealed.

First her bad dreams became reality, and now Olivia is "dreaming" while awake, seeing elaborate bleak visions of things not really there. While investigating the disturbing case of a woman who apparently spontaneously combusted, Olivia throws caution to the wind and mines her unexplained visions for clues. Meanwhile, Walter comes clean about his prior knowledge of the Z.F.T. manifesto, and Peter's secret project is revealed and yields surprising help in unraveling the mystery.

Someone is killing people and draining their spinal cord fluid. Olivia, Peter, and Walter go to great lengths to stop the deaths, which are happening more and more frequently.

Olivia dreams about a suicide as the event really happens at Grand Central Station; shocking information about the ZFT manuscript is revealed.

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 scientific 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. With Charlie’s life on the line, Walter must come face-to-face with both his past and the beast.

While dealing with a serial killer from her past, Olivia bonds with a mysterious mute child.

German agents question Olivia about her “relationship” with David Robert Jones, an escaped prisoner questioned months earlier now living in the U.S. Meanwhile, the Fringe Division investigates a threatening case where victims die faceless from their orifices suddenly sealing. With few leads and many questions, German authorities turn to Olivia, Peter and Walter to help makes sense of the return of Mr. Jones and the foreboding mysterious occurrences. As the investigation unfolds, Olivia is put to the test.

When bizarre twisted remains are found among the debris of a crashed jumbo jet, Olivia and Peter end up going undercover as part of their investigation.

A trial of deaths across the country has a consistent pattern: in each case, the victim's brain has been liquefied.

Broyles puts Agent Mitchell Loeb in charge of the task force assigned the missing Agent Dunham... unaware of the role Loeb has in her disappearance.

The team is called in on a bank robbery similar to other robberies in the area but this particular bank has the thief embedded inside the steel wall of the bank. Somehow the thieves have found a way to defy the law of physics. Walters thinks their after something of his. As the investigation deepens it all comes to a head when the thieves ambush one of the team.

The team is called in to investigate why a man jumps out a window because he thinks he's being attacked by butterflies. Olivia gets some breaks in solving the case from her former partner and that she is so desperate to rid herself of him that she demands to go back into the tank. Meanwhile, some former friends and current foes of Peter find out that he's back in Boston.

Walter's former bunkmate at the mental institute is linked to the abduction of a young musical prodigy by a serial kidnapper. Peter is concerned when Walter insists on going back to the mental institute to solve the case.

A parasite mysteriously latches onto a dying FBI agent's internal organs. Agent Dunham rushes to Germany to meet a prisoner for information about the threat they face.

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. As the gruesome scene is investigated, dangerous levels of radiation are detected, and unusual circumstances surrounding the case point to illegal human drug trials and possibly something even more sinister. Meanwhile, Walter obsesses about cotton candy, Peter strikes a bargain with Nina Sharp and a startling piece of Olivia's past is revealed.

A deliveryman discovers he has the ability to control electrical devices and discharge current, leading to an elevator crash. Walter recognizes the accident as caused by someone who has undergone electrical augmentation, similar to a project he conducted using homing pigeons. Meanwhile, Olivia gets a visitor from her past.

Broyles calls in the team to investigate a deadly explosion and its source: a strange cylinder unharmed despite the destruction. Olivia determines that the same cylinder, or a similar one, is responsible for similar events in widely diverse locations.

A bizarre incident on a bus leaves the passengers asphyxiated in transparent silicon, and the only "witness" is a man who is psychically linked with the individual responsible.

The trio's unlikely partnership develops as they investigate the death of a woman who conceives, has a full-term pregnancy, and gives birth all within a few hours. After the birth, the baby ages to 80 years old and dies in only a few minutes. While the team looks into this bizarre event, Dr. Bishop begins testing in his lab.

Special FBI Agent Olivia Dunham is part of the team called in to investigate when Flight 627 lands with everyone on board dead: their flesh liquefied. When her partner and lover is contaminated by a similar chemical that crystallizes his skin, Olivia discovers the one man who can help has been institutionalized for twenty years.

Interviews with the cast and executive producers of Fringe