Fringe

At the conclusion of last season, a distraught Peter returned to his otherworldly origins to reconnect with his roots and his birth mother (guest star ORLA BRADY). When the Fringe Team mobilized to retrieve Peter, it was seen as an attack on the alternate universe and led to an intense situation with Walter and Olivia pitted against their doppelgangers in a race against time. William Bell made the ultimate sacrifice that paved the way for Peter to return "over here" with Walter and a disguised alternate Olivia at his side. This extraordinary turn of events shockingly left an imprisoned Olivia "over there." The quest to retrieve Peter from the parallel universe will raise questions about identity and choices next season. In the Season Three premiere, a disoriented Olivia fights to find her way home, and we are introduced to her mother, Marilyn (guest star AMY MADIGAN). Meanwhile, Peter and Walter try to move on with their lives -- unknowingly alongside the alternate Olivia.

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. The unlikely suspect: a mysterious box. As Peter and Walter collaborate to study its properties, alternate Olivia presses on and turns up the heat on an unsuspecting Peter. Meanwhile, key information about the future is revealed when Walter and Nina meet at Massive Dynamic for the emotional reading of the last will and testament of William Bell.

In this case, timing is everything as a series of anomalous events lead the Fringe Division to investigate deadly incidents with unimaginable coincidences. As the freaky crimes continue to occur, the team is in a race against time to protect potential victims. Meanwhile, Secretary Bishop shares his strategic plan with Colonel Broyles as Olivia grapples with a heart-stopping vision.

Concerned about the consequences of a distressing development involving a high-ranking official, Newton is forced to call to action a sleeping shapeshifter. As Walter and the rest of the team gather evidence, they move the investigation to Massive Dynamic, where Olivia goes on high alert and Walter finds himself in a perilous situation.

The alternate universe Fringe Division investigates a shocking breach of security when a twin frees his brother (guest stars SHAWN and AARON ASHMORE) from a quarantined Amber area. As the team sets out to crack this sophisticated case, Walternate experiments more with Olivia as she reenters the tank. Meanwhile, visions of Peter continue to haunt Olivia about returning to the "other side."

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. Much to Walter's dismay, Peter presses on with piecing together the mass destruction device. Just as alternate Olivia and Peter's chemistry deepens, the anticipation of Olivia's return escalates.

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. In the meantime, Olivia fights on and reunites with Henry (guest star ANDRE ROYO) to enlist his services on an intense and covert mission to return home.

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.

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.

In the midseason premiere episode, an Observer makes contact with the Fringe Team to help rectify a mistake. Meanwhile, Walter befriends Roscoe Joyce (guest star CHRISTOPHER LLOYD), one of his musical heroes and keyboardist for Walter's favorite 1970s band, "Violet Sedan Chair." Learning the real reason the band broke up, Walter realizes that their lives overlap in strange and unexpected ways -- even though they've never met before.

Two incidents trigger one massive investigation! When the Fringe Team visits Massive Dynamic's assembly of doomsday device, Walter becomes greatly concerned for Peter's wellbeing -- so he turns to Nina for added brainpower to understand the relationship between Peter and the superweapon. Meanwhile, the discovery of a dead body triggers an intense investigation.

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. As the Fringe Team investigates further, a subject from Walter's past with ties to Olivia reluctantly agrees to assist with the intense case.

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. Meanwhile, alternate Olivia is reunited with her beau, and Walternate remains determined to save his world but discovers there are certain lines he will not cross.

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.

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.

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.

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.

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.

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 (guest star KEVIN CORRIGAN) in a desperate race against time.

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.