Olivia’s sister, Rachel (Ari Graynor), visits; Walter, Peter and Olivia try to solve the murder of an esteemed epidemiologist, which may be linked to Olivia’s abduction.

The team is called in on a bank robbery similar to other robberies in the area but this particular bank has the thief embedded inside the steel wall of the bank. Somehow the thieves have found a way to defy the law of physics. Walter thinks they’re after something of his. As the investigation deepens it all comes to a head when the thieves ambush one of the team.

The team is called in to investigate why a man jumps out a window because he thinks he’s being attacked by butterflies. Olivia gets some breaks in solving the case from her former partner and that she is so desperate to rid herself of him that she demands to go back into the tank. Meanwhile, some former friends and current foes of Peter find out that he’s back in Boston.

Walter thinks the abduction of a young music prodigy is linked back to his old bunkmate at St. Claire’s Hospital. When he kidnaps the child he see’s a sequence of flashing lights. Olivia wants Walter to return to the mental institution much to Peter’s outcry, but Walter’s determination to help ends up having chilling ramifications.

When a strange parasite attaches itself to the internal organs of a dying FBI agent, Olivia suspects a connection to the Pattern; Peter and Walter tap into a dead man’s brain waves.

The team investigates a woman that re-appears after weeks of being missing with a rare disease. She also inexplicably causes pain and death to the people she meets. During the investigation, dangerous level of radiation are detected. Walter obsesses about cotton candy; Peter strikes a deal with Nina Sharp; and a truth about Olivia is discovered.

The team investigate the case of a man who can project electricity… and is at the center of a series of strange deaths involving electricity.

Broyles calls in the team to investigate a deadly explosion and its source: a strange cylinder unharmed despite the destruction. Olivia determines that the same cylinder, or a similar one, is responsible for similar events in widely diverse locations.

The team investigates a bus full of dead commuters that appear to be fossilized and uncover a man who has visions of pattern-related disturbances before they happen; Dr. Bishop requests a piano in the lab to help him process data.

Olivia, along with Peter and Walter Bishop, investigates the strange death of a woman who had an even stranger child. The woman was pregnant for only hours, yet the baby she birthed was fully developed – and also aged eighty years in the span of a few minutes. Olivia asks Nina Sharp of Massive Dynamic for help.

When all the passengers on a plane die, FBI agent Olivia Dunham investigates the events and her partner almost dies. A desperate Olivia looks for help from Dr. Walter Bishop who has been institutionalized. Olivia, Dr. Bishop and his son Peter begin to discover what really happened on Flight 627 and begin to uncover a larger truth.

Season Finale- Backed into a corner, Emily is forced to admit her guilt, but she’ll have to decide how far she’ll go before admitting defeat.

Emily enlists Nolan and Jack to help prove her innocence while Ben takes measures to keep her locked up.

As Emily sifts through the wreckage of her life, even her closest friends worry she has finally gone too far.

After Victoria is attacked, she takes matters into her own hands, while Emily is forced to come to terms with what she really wants.

Emily plans to reclaim her life as Amanda Clarke and her outlook is bright, but that changes when Victoria unearths shocking secrets from her past.

While dealing with grief, Emily is faced with collateral damage; Victoria goes after a new lead.

Emily strives to clear Jack’s name; Louise and Nolan are visited by officer Ben Hunter. Emily thinks Margaux is behind it. Jack’s mother comes to defend him. And with Emily they try to prove Jack’s innocence. Emily asks Victoria to talk Margaux.

Natalie throws a Fourth of July party and invites David as her date. Ben turns to Emily and Nolan for help when Margaux threatens his ex-wife. Lyman after failing to help Victoria turns to someone else and it turns out deadly.

When Margaux uses her ammunition against both Emily and Jack, their friendship takes a dramatic turn. Meanwhile, Natalie shows Victoria the true reason behind her arrival in the Hamptons.

Emily helps Nolan’s blushing bride deal with the skeletons in her closet while Victoria contends with a mysterious new socialite.

In order to survive, Emily and Victoria must set aside their grudge, while Jack and David race to save them before they kill each other.

David finally decides to settle his debt to Victoria while Emily helps Nolan with a takedown of his own.

As Emily and Victoria grieve, David springs into action to protect his loved ones.

Jack is torn between Emily and the new woman in his life, while Nolan and Louise bring Southern charm to East Hampton.

Emily and Victoria learn that information is the most dangerous weapon while Nolan offers up information of his own in order to salvage his reputation.

Victoria’s future hangs in the balance as the FBI closes in and a mysterious new enemy strikes.

Daniel confronts Emily about the secrets she kept while things heat up between Margaux and Louise.

Charlotte’s downward spiral takes her to a place where even Emily worries she can’t be saved as David and Nolan have a very public reunion.

Emily tries to arrange a reunion with her dad, but she needs to be creative about it now that he’s in the spotlight again and Victoria’s regained the upper hand.

Emily is shaken to her core by an unexpected revelation. Victoria sinks her claws deeper into David.

Emily’s life is on the line as Victoria orchestrates a family reunion with deadly potential, regardless of who gets caught in the crossfire.

Emily confronts former friends and a lifelong enemy in a desperate search for Victoria. The fallen Queen of the Hamptons finds herself at the mercy of her own darkest secret.

As Emily plans to host her most surprising 4th July party ever, Victoria finds a way to turn her greatest setback into a dangerous advantage. Unbeknownst to Emily, Nolan and Jack, David Clarke plans his next move.

Nothing is off limits as Emily and Victoria are dead set on destroying each other. Lives will be lost and fates will be altered, but who will rise victorious?

Dire circumstance leads Emily to take extreme measures against both the Graysons and those closest to her.

As the Graysons gain the upper hand, Emily must take on a new identity to expose them.

As Emily learns onto the identity of a key conspirator against her father, Victoria sets a trap she knows Emily can’t resist.

Aiden and Emily discover long-buried family secrets; Victoria pays Mason Treadwell (Roger Bart) a surprise visit as she gets closer to exposing Emily.

Emily uses her newly single status to unravel a mystery from the past as Pascal attempts to make up for lost time with Victoria.