Life "over there" becomes more intense as Olivia finds herself in great danger.

While investigating an apparent suicide, the Fringe team encounters a woman with uncanny characteristics.

The team investigates a group of thieves who are able to break the laws of gravity; Walter attempts to delay the damage he has caused.

Revisiting an intense period in the lives of the Bishops and Olivia.

The team is led to the home of a grieving widow; Peter and Olivia try to fix their relationship.

A terrorist ``over there'' arms himself with an insect that enjoys human flesh; alternate Olivia is reunited with her boyfriend; despite remaining determined to save his world, Walternate discovers there are lines he won't cross.

A scientist dies after ingesting a cloud of blue powder that disintegrates his bones; a person from Walter's past reluctantly agrees to help with the investigation.

Walter worries about Peter after observing Massive Dynamic's assembly of the doomsday device; an intense investigation begins after a dead body is discovered.

The team works with an observer to fix a mistake; Walter befriends someone he admires.

A shapeshifter is called into action; Walter finds himself in a dangerous situation during an investigation at Massive Dynamic.

The team races to investigate a series of anomalous events; Secretary Bishop shares his plan with Col. Broyles; Olivia struggles with a heart-stopping vision.

Life "over there" becomes more intense as Olivia finds herself in great danger.

While investigating an apparent suicide, the Fringe team encounters a woman with uncanny characteristics.

The team investigates a group of thieves who are able to break the laws of gravity; Walter attempts to delay the damage he has caused.

Revisiting an intense period in the lives of the Bishops and Olivia.

The team is led to the home of a grieving widow; Peter and Olivia try to fix their relationship.

A terrorist ``over there'' arms himself with an insect that enjoys human flesh; alternate Olivia is reunited with her boyfriend; despite remaining determined to save his world, Walternate discovers there are lines he won't cross.

A scientist dies after ingesting a cloud of blue powder that disintegrates his bones; a person from Walter's past reluctantly agrees to help with the investigation.

Walter worries about Peter after observing Massive Dynamic's assembly of the doomsday device; an intense investigation begins after a dead body is discovered.

The team works with an observer to fix a mistake; Walter befriends someone he admires.

A shapeshifter is called into action; Walter finds himself in a dangerous situation during an investigation at Massive Dynamic.

The team races to investigate a series of anomalous events; Secretary Bishop shares his plan with Col. Broyles; Olivia struggles with a heart-stopping vision.