Someone close to Fringe Division is attacked, and bioterrorist David Robert Jones returns. Meanwhile, Walter disappears inexplicably.

Olivia has some bad dreams that end up coming true, and then begins seeing visions while awake that aren't really there. She uses these visions to help solve the case of a woman who spontaneously combusted.

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.

A suicide incident occurs at Grand Central Station, which Olivia dreams about. Meanwhile, shocking details emerge about the ZFT manuscript.

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.

Olivia makes a bond with a mysterious child that was living alone underground. Meanwhile, a serial killer reemerges.

The German authorities interrogate Olivia in an attempt to locate Mr. Jones. Meanwhile, the team investigates a bizarre series of incidents where the victims' facial orifices close over, leaving them faceless corpses.

Olivia and Peter go undercover to investigate after the discovery of bizarre remains at a jumbo jet's crash site.

Olivia, Walter and Peter are brought in to try and stop a killer with the ability to liquefy the human brain.

The FBI and an increasingly desperate Peter search for the abducted Olivia... unaware that the man heading the investigation is the one responsible for her disappearance.

The team is called in to investigate a bank robbery when one of the thieves is found embedded in a solid wall. Walter believes they're after something of his, but things take a turn for the worse when the thieves ambush one of them.

A Massive Dynamic employee leaps to his death after hallucinating a butterfly attack. Agent Scott proves useful in investigating the case, but a frustrated Olivia wants to remove him from her consciousness once and for all. Meanwhile, Peter deals with som

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.

The team investigates a woman that re-appears after weeks of being missing, with a rare disease and she inexplicably causes pain and death to the people she meets. In the investigation dangerous level of radiation are detected. Walter obsesses about cott

The team investigate the case of a man who can generate electrical phenomena... and is at the center of a series of strange deaths involving electronic devices.

The team investigates a strange cylinder, found in a deadly explosion at a construction site in New York City. The cylinder was in the middle of the explosion and was completely unharmed. Olivia uncovers a correlation between different disturbing events.

The team investigates a bus full of dead commuters that appear to be fossilized and uncover a man who has visions of pattern-related disturbances before they happen; Dr. Bishop requests a piano in the lab to help him process data.

Olivia, along with Peter and Walter Bishop, investigates the strange death of a woman who had an even stranger child. The woman was pregnant for only hours, yet the baby she birthed was fully developed - and also aged eighty years in the span of a few min

When all the passengers on a plane die, FBI agent Olivia Dunham investigates the events and her partner almost dies. A desperate Olivia looks for help from Dr. Walter Bishop who has been institutionalized. Olivia, Dr. Bishop and his son Peter begin to dis