Season 3 (2010-11)
Number of Episodes: 22
Intro: Season 3 of Fringe opens with Agent Olivia Dunham trapped in the alternate universe from which she helped rescue Peter in Season 2. Unbeknownst to those around her in our universe, the alternate Olivia has taken her place over here, infiltrating her way into the lives of her colleagues while the real Olivia struggles to find a way home.
Original Air Dates: September 23, 2010 - May 6, 2011 at 9:00 PM ET/PT on Fox

Episode #: 301 (44)
Title: "Olivia"
Summary: After the extraordinary turn of events that shockingly left an imprisoned Olivia "over there," she fights to find her way home. Meanwhile, Peter and Walter try to move on with their lives unknowingly alongside alternate Olivia.

Episode #: 302 (45)
Title: "The Box"
Summary: The Fringe Team "over here" investigates a mystifying case that people are discovered in a trance-like 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.

Episode #: 303 (46)
Title: "The Plateau"
Summary: Inconsequential acts lead to deadly consequences, and the Fringe Division investigates while Olivia deals with a sinister vision. Meanwhile, Secretary Bishop reveals his plan for Olivia to her commander, Colonel Broyles.

Episode #: 304 (47)
Title: "Do Shapeshifters Dream of Electric Sheep?"
Summary: Newton activates a "sleeper" shapeshifter agent, and Fringe Division's investigation of the case leads to Massive Dynamic.

Episode #: 305 (48)
Title: "Amber 31422"
Summary: On the Other Side, a man sets out to free his twin brother from an amber quarantine zone. Meanwhile, Walternate begins the experiments to duplicate Olivia's ability to transition safely between worlds.

Episode #: 306 (49)
Title: "6955 kHz"
Summary: On This Side, 15 people across the Eastern Seaboard suffer amnesia after hearing the same radio frequency, and the Fringe team is called in. Meanwhile, Peter continues to work on the Other Side's mass-destruction weapon and pursue his relationship with "Olivia," unaware of who she truly is.

Episode #: 307 (50)
Title: "The Abducted"
Summary: On the Other Side, Olivia tries to handle a series of kidnappings with connections to Colonel Broyles, while turning to a hidden ally to find a way back home.

Episode #: 308 (51)
Title: "Entrada"
Summary: Olivia tries to find an ally to help her, while a device allowing communication between the two worlds is uncovered. Meanwhile, Peter tries to deal with recent revelations about the world-destroying device and Bolivia's true identity.

Episode #: 309 (52)
Title: "Marionette"
Summary: While the Fringe team investigate the case of a man who had his heart extracted, Peter deals with the revelation of who he's been dating for the last few months."

Episode #: 310 (53)
Title: "The Firefly"
Summary: The Observer reunites musician Roscoe Joyce with his dead son, setting off a series of events that culminate in a life-or-death test for Walter. Meanwhile, Olivia deals with the repercussions of her absence from This Side, and Walter bonds with Joyce, one of his musical heroes.

Episode #: 311 (54)
Title: "Reciprocity"
Summary: Walter asks Nina if she can understand the connection between Peter and the doomsday device, while the team visits the assembly of the doomsday device at Massive Dynamic. Meanwhile, a dead body's discovery causes a huge investigation.

Episode #: 312 (55)
Title: "Concentrate and Ask Again"
Summary: The CDC calls in the Fringe team to investigate the death of a scientist whose bones were disintegrated by a mysterious blue cloud. Someone from Walter's past reluctantly agrees to assist the team... despite their connection to Olivia.

Episode #: 313 (56)
Title: "Immortality"
Summary: Over There, a terrorist arms himself with a flesh eating insect, while alternate Olivia reunites with her boyfriend. Meanwhile, while determined to protect his universe, Walternate discovers there are some lines he won't cross.

Episode #: 314 (57)
Title: "6B"
Summary: The Fringe team visits a widow who is connected to a mysterious event. Meanwhile, Peter and Olivia try to resolve the issues between them.

Episode #: 315 (58)
Title: "Subject 13"
Summary: In a look at the past, the six months after Young Peter was saved from the lake are examined, and secrets of Olivia's past are revealed.

Episode #: 316 (59)
Title: "Os"
Summary: While Walter attempts to figure out a way to stop the spread of vortexes on This Side, the team investigate a series of thefts committed by criminals who can defy gravity.

Episode #: 317 (60)
Title: "Stowaway"
Summary: Fingerprints at the scene of an apparent suicide lead the Fringe team to a seemingly immortal woman.

Episode #: 318 (61)
Title: "Bloodline"
Summary: TBD