Original air date: 09/23/2011 Runtime: 43:15 min. The Fringe Team takes new shape as the impact of Peter's heroic choice unfolds in the fourth season premiere. Just one week after Peter Bishop saved the day and was then wiped from existence, The truce between the two worlds remains intact and the two sides are forced to work together. Lincoln Lee (series star SETH GABEL) joins the Fringe team as they investigate a shapeshifter case that is very personal to him.
Original air date: 09/30/2011 Runtime: 42:44 min. As the victims of a highly intelligent serial killer Over There stack up, The Fringe Division Over Here is asked to assist. As the two sides tangle and innocent people remain at risk, The suspect's doppelganger Over Here, a professor who teaches Forensic Psychology, is brought into the fold and forces the team to consider the notion of sending civilians to the other side.
Original air date: 10/07/2011 Runtime: 43:21 min. When two 12-year-old kids bully another boy, They are found dead¦and in just hours after dying, Their bodies are shockingly in an advanced state of decomposition. As the Fringe team investigates the mysterious case, They uncover an amorphous figure claiming more victims. Meanwhile, Walter becomes increasingly distracted by his hallucinations.
Original air date: 10/14/2011 Runtime: 43:22 min. Olivia uncovers a dangerous force that may be connected to Walter's past experiments with the drug Cortexiphan. Their investigation forces Walter to leave the lab for the first time in years as he and Olivia head to Massive Dynamic in New York to examine old case files. Walter struggles with life outside the lab as he comes face-to-face with the demons of his past.
Original air date: 11/04/2011 Runtime: 42:44 min. Some things are not meant to be tampered with. In the aftermath of recent shocking events, things really escalate when the translucent shapeshifters return. As the threat and circumstances intensify, a former Massive Dynamic scientist Malcolm Truss (guest star ARYE GROSS) enters the fold. Meanwhile, Nina Sharp pays Walter a visit in the lab.
Original air date: 11/11/2011 Runtime: 43:44 min. The Fringe team must find the pattern between tragic time loop anomalies. As the investigation unfolds, Raymond (guest star STEPHEN ROOT), an electrical engineer, and his wife Kate (guest star ROMY ROSEMONT), a professor of theoretical physics, enter the picture and time becomes a matter of life and death.
Original air date: 11/18/2011 Runtime: 43:19 min. When a man mysteriously dies by an invisible force, his body rapidly begins turning ghostly white. The Fringe team learns that this is not an isolated incident, and there's evidence that links the predator to someone who passed away with an unknown genetic disorder. Meanwhile, Olivia suffers from mysterious migraines.
Original air date: 01/13/2012 Runtime: 43:44 min. The time has come to choose a side. In an effort to find a way home, Peter journeys to the Other Side to confront Walternate a venture that proves more dangerous than expected. Meanwhile, Olivia receives a dire premonition from an Observer.
Original air date: 05/11/2012 Runtime: 43:05 min. In the climactic conclusion of the two-part Season Four finale, The Fringe team is pushed to their breaking point as they desperately attempt to prevent a catastrophic event that threatens the lives of everyone.In the climactic conclusion of the two-part Season Four finale, The Fringe team is pushed to their breaking point as they desperately attempt to prevent a catastrophic event that threatens the lives of everyone.