Fringe: Season 4
| # | Air Date | Title |
| 1 | Sep 23 2011 |
Neither Here Nor ThereJust 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.… |
| 2 | Sep 30 2011 |
One Night in OctoberAs 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… |
| 3 | Oct 07 2011 |
Alone in the WorldTwo young bullies are found dead and in just a few hours they rot to an advanced state of decomposition. The Fringe team investigates and uncovers an amorphous figure claiming… |
| 4 | Oct 14 2011 |
Subject 9Olivia uncovers a dangerous force that may be connected to past experiments with Cortexiphan. The investigation forces Walter to leave the lab for the first time in years and t… |
| 5 | Nov 04 2011 |
NovationOlivia and the others of Fringe division attempt to determine the origin of Peter Bishop, who purports himself as Walter’s son who had died as a young boy in the original… |
| 6 | Nov 11 2011 |
And Those We've Left BehindThe Fringe team must find the pattern between tragic time loop anomalies. As the investigation unfolds, Raymond, an electrical engineer, and his wife Kate, a professor of theor… |
| 7 | Nov 18 2011 |
WallflowerWhen 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 evi… |
| 8 | Jan 13 2012 |
Back to Where You've Never BeenIn an effort to find a way home, Peter journeys to the Other Side to confront Walternate. However, his venture proves more dangerous than expected. Meanwhile, Olivia receives a… |
| 9 | TBA |
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| 9 | Jan 20 2012 |
Enemy of My EnemyPeter’s visit to the other side intensifies as the alternate FRINGE division faces off against a formidable new foe in a harrowing race against… |
| 10 | TBA |
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| 10 | Jan 27 2012 |
Forced PerspectiveOlivia continues to cope with the ominous warning from the Observers, while Peter and the team track a girl with the mysterious ability to predict death. |
| 11 | TBA |
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| 11 | Feb 03 2012 |
Making AngelsOver Here Astrid gets an unexpected visit from her Alternate, while Peter and Olivia track a killer using a toxin that has yet to be invented. Both universes collide in a case… |
| 12 | Feb 10 2012 |
Welcome to WestfieldPeter, Olivia and Walter come face to face with a mysterious and terrifying Fringe event as they get trapped in a town that there’s no escaping from. |
| 13 | Feb 17 2012 |
A Better Human BeingAs the Fringe team investigates a mentally ill patient who appears to be connected to a series of murders, frightening clues and connections are uncovered that lead Olivia to s… |
| 14 | Feb 24 2012 |
The End of All ThingsThe dying Observer comes to see Walter and Peter, who must take extreme measures to learn what secrets he hides and determine if he knows where Olivia is. Meanwhile, David Robe… |
| 15 | Mar 23 2012 |
A Short Story About LoveFollowing the recent shocking revelations and emotional events, Peter weighs his options as the Fringe team investigates a killer targeting love. |
| 16 | Mar 30 2012 |
Nothing As It SeemsThe Fringe team faces a case that appears familiar to Peter. Strangely, it takes place in this world. |
| 17 | Apr 06 2012 |
Everything in Its Right PlaceLincoln travels to the other side to join forces with Fauxlivia and his own alternate, as they search for a vigilante with a surprising connection to the shapeshifters. |
| 18 | Apr 13 2012 |
The ConsultantWalter travels to the Alternate Universe to assist in the investigation of a Fringe event with ties to both worlds. Meanwhile, David Robert Jones reveals his next target. |
| 19 | Apr 20 2012 |
Letters of TransitThe Fringe team goes back to the future as the story jumps ahead to 2036, when the Observers and the Fringe team engage in a game-changing battle. |
| 20 | Apr 27 2012 |
Worlds ApartThe teams on both sides fight on for a common cause, and there are shocking developments tied to the Cortexiphan children. |
| 21 | May 04 2012 |
Brave New World (1)A mysterious Fringe event causing people to spontaneously combust forces Walter to revisit his painful past while the Fringe team faces off against David Robert Jones to save t… |
| 22 | May 11 2012 |
Brave New World (2)The Fringe team is pushed to the breaking point as they desperately attempt to prevent a catastrophic event that threatens the lives of everyone. |