In the pilot episode, an FBI agent recruits a brilliant but incarcerated scientist (John Noble) and his estranged, sharp-witted son (Joshua Jackson) to investigate an airborne tragedy that may harbinger a trend of increasingly unsettling phenomena. The executive producers include J.J. Abrams, Alex Kurtzman and Roberto Orci.
The bizarre death of a woman who gave birth to a rapidly aging baby after an hours-long pregnancy challenges the nascent partnership between Dr. Bishop, Peter and Olivia, who reaches out to Massive Dynamic's Nina Sharp for answers.
During the investigation of the bizarre deaths of a bus full of commuters, Olivia, Peter and Dr. Bishop reach out to a troubled man with prognosticative powers of Pattern-related catastrophes who might be able to help them prevent another tragedy.
The only thing found intact after an explosion rocks a New York City construction project is a mysterious cylinder, so Broyles enlists the trio of Olivia, Dr. Bishop and Peter to investigate the significance of the object, which seems to be related to a string of inexplicable behavior and events.
Dangerous consequences of a man's peculiar ability to harness electricity draw the attention of Olivia, Peter and Dr. Bishop, whose unorthodox methods extend to including the use of homing pigeons to aid their investigation.
The reappearance of a missing woman with a rare disease puts everyone she meets in jeopardy and coincides with detections of dangerous radiation levels, raising suspicions of a link to illegal drug trials involving humans.
The appearance of a strange parasite inside the body of an ailing FBI agent prompts a hurried trip to Germany for Olivia, who learns even more unpleasant news from a man imprisoned there. Meanwhile, Dr. Bishop and Peter try to read a dead man's brain waves.
The circumstances surrounding a music prodigy's kidnapping cause Dr. Bishop to be reminded of a fellow inmate at St. Claire's, but Olivia's suggestion that he return to the hospital draws criticism from Peter.
The investigation of a bizarre tragedy at Massive Dynamic spawns Olivia's desire to erase her memories of John Scott, while Peter's whereabouts are revealed to some unsavory players from his murky past.
A series of bank robberies are investigated by Olivia, Peter and Dr. Bishop, whose discovery of a personal link to the tech-savvy thieves' ambition ultimately puts one of the trio in grave danger.
A visit from Olivia's sister (Ari Graynor) and a formal review of the Fringe Division coincide with the investigation of the murder of a famous scientist, which may have something to do with Olivia's recent abduction.
A series of particularly gruesome murders across the country lead Walter to determine that the killer is turning the victims' brains into liquid, but solving the case has a special urgency for Olivia, who fears for the welfare of a loved one.
The investigation of another airborne disaster yields evidence of a strange virus, but Olivia and Peter must go undercover to determine the scope of danger presented by this new threat.
While the Division is flummoxed by a mysterious toxin that is killing people by making their facial features disappear, German authorities want to know all about Olivia's contact with escaped convict David Robert Jones, who has relocated to the U.S.
Olivia establishes a silent bond with a mute child who has been living under a building targeted for demolition, and their connection coincides with the reappearance of a serial killer who is known for macabre public displays of his deadly deeds.
An animal-rights organization's rescue mission at a laboratory backfires when it releases a vicious beast, almost mythological in appearance with a lion's body and eagle's talons, and Charlie is in danger of being its latest victim.
An actual suicide at New York City's Grand Central station is witnessed by Olivia---in Boston---in a dream, kicking off a baffling series of nightmares that may be linked to the ZFT manifesto, the drug Cortexiphan and her own childhood. Written and directed by Oscar-winning screenwriter Akiva Goldsman ("A Beautiful Mind").
When a serial killer is draining victims of spinal fluid, the investigation by Olivia, Peter and Walter leads to a scientist who may be linked to a ZFT cell of bioterrorists.
The investigation of a suspected case of spontaneous combustion coincides with Olivia's detailed but inexplicable visions, Walter's focus on the ZFT manifesto and a potentially pivotal revelation from Peter.
The first-season finale includes an appearance by the much-discussed, but never seen, Massive Dynamics founder, William Bell (Leonard Nimoy), the return of David Robert Jones and a mysterious vanishing act by Walter.