When shrewd and confident FBI Special Agent Audrey Parker arrives in the small town of Haven she soon finds herself caught up with the return of The Troubles, a plague of supernatural afflictions that occurred in the town at least once before. If that was not enough to draw her in, she also finds a link that may lead her to the mother she has never known.
The Biblical Plagues of Egypt strike Haven, while Audrey deals with a woman who claims that she is Audrey Parker and Nathan copes with the death of his father. Meanwhile, Reverend Driscoll begins his plan to take control of Haven and eliminate the Troubled.
People start seeing their worst fears, and Nathan and Audrey realize that the visions are tied to the theft of a puzzle board that can destroy Haven. Meanwhile, the new Audrey tries to track down the mysterious FBI Agent Howard and learns of his connection to the late Chief Wournos.
While FBI agent Audrey pursues the investigation into the fake Agent Howard, Nathan and Audrey deal with an outbreak of machines with minds of their own... and a desire to kill.
A mysterious Haven resident may prove the key to helping Nathan and Audrey stop an outbreak of electrocutions. Meanwhile, Duke reluctantly accepts his ex-wife's help finding a way to protect himself from the tattooed man.
Audrey and Duke invite Chris and Evi along to a wedding at an isolated home... and discover that one of the guests is apparently a Troubled individual with the ability to control plant life.
Audrey finds herself trapped by time when a repeating cycle of events involving a runaway car lead to the deaths of her loved ones.
An apparent drowning suicide turns up on a Haven beach, and Audrey and Nathan soon discover that he is tied to an enigmatic family compound, and that the family has abducted a local woman's child. Meanwhile, Duke learns that the family is connected to the tattooed man.
A banker hides a dark secret that connects him to a killer hiding in Haven. Meanwhile, Duke helps a young runaway and Nathan discovers that his job is at risk.
When a Troubled individual unleashes a rotting plague inside the police station, the new Chief orders a quarantine... trapping Audrey and the others inside. Meanwhile, Duke confronts Evi about her betrayal of him.
Audrey and Nathan take a search party into the woods to find a missing boy whose disappearance may be connected to the Troubles, and receive some unwanted help from Driscoll.
With Nathan's help, Audrey finally locates Lucy Ripley and goes to confront her. Meanwhile, Duke and Dwight join forces to discover what Duke's father Simon left for his son.
Haven's dead rise from their graves to reveal the town's secrets... and those of Audrey, Nathan, and Duke.
Audrey is the only one who realizes that there are Christmas decorations in July that no one else finds unusual. The out-of-season decorations are only a prelude to the bizarre bisection of a surfer and a series of escalating disappearances of people who no one can remember except Audrey.
A series of fatal animal attacks lead Audrey and Nathan to investigate a local woman who supports animal rights. However, they soon discover that while she may not be Troubled, the person responsible is... and Chief Wournos is the next target.
Two mysterious assaults involve crooked businessmen, and sketching charcoal is found at each crime scene. However, the boy the officers suspect is responsible becomes a third victim, leaving them to pursue a new line of investigation.
Audrey and Nathan learn of a ghost story that wanders the Haven clinic and takes the lives of sick people before their time.
Audrey's surprise birthday party at a local hotel goes awry when a shapeshifter stalks the partygoers, and nobody knows who can be trusted.
Audrey joins in a friendly game of poker aboard Duke's ship, but the two new players soon lock everyone up and try to find a box that Duke is smuggling. Meanwhile, Audrey's boss arrives in town and demands answers.
Audrey and Nathan investigate when a gust of wind seemingly throws a woman into a wall following an argument, and the FBI agent suspects some children may have telekinetic powers.
As the mysterious cracks spread throughout Haven at an increasing rate, a mysterious criminal returns to Haven and Audrey discovers the secrets of her past and her mother's.
While Nathan and Duke set aside their differences and try to find Audrey, a Troubled individual is plagued by alien abductors.
Naked savages wander the streets of Haven. While Nathan and Audrey try to determine who they are and where they've come from, Duke convinces the Teagues to let him see the old newspapers and determine who the mysterious "Hunter" is and how he's connected to Audrey.
Audrey and Nathan encounter a bizarre series of deaths suggesting a serial killer, with a unique “trouble”, is at work in Haven. Meanwhile, a Boston cop tries linking the town's latest body to similar cases.
Audrey and Nathan investigate a series of strange incidents where the only common factor is a missing woman. Meanwhile, Duke insists on tailing along on the officers' investigation, while the Teagues do some digging on Tommy's background.
A female vigilante stalks Haven's criminals, rendering poetic justice. Meanwhile, Nathan grows closer to Jordan as he attempts to infiltrate the Guard, and Audrey learns more about the bolt-gun killer that is stalking her.
On Halloween night, Audrey, Nathan and Duke become trapped inside a haunted house.
While Audrey and Duke track down the Colorado Kid's parents, Nathan and Tommy investigate Troubled incidents involving the resurrection of dead for payment.
Audrey and Duke return from Colorado. Audrey, Duke and Tommy try to find the woman with the resurrection touch. Meanwhile, the Teagues realizes that the Bolt Gun Killer has tricked them and track the murderer to his real target.
A Troubled war veteran sends Duke and Nathan back to 1955. Meanwhile, in the present Audrey tries to deal with an altered timeline where Driscoll's men have taken over the town.
Facing the looming prophecy of her disappearance in just a few days, Audrey tries to do anything that will alter her fate, but a series of events bring her face-to-face with the Bolt Gun Killer.
When Haven falls into a deep sleep, Audrey must work with the only other person awake in town. Meanwhile, more questions arise about the Bolt Gun Killer.
Nathan and Duke try to help Audrey search for a troubled killer after a string of murders take place at the Haven High School.
As Audrey grapples with her fate; at the same time she, Nathan and Duke prepare for a showdown with the Bolt Gun Killer.
Audrey, Nathan and Duke's victory over William feels hollow as they deal with the aftermath of Duke on death's door, Mara in control of Audrey's body, and a strange trouble supernaturally silencing citizens all over town.
Duke struggles to accept Jennifer's death; Nathan searches for some shred of Audrey in Mara's cruel personality; Dwight shoulders the heavy burden of holding Haven together.
Nathan makes a desperate play to protect Mara from the furious citizens of Haven, leaving Dwight and Duke to deal with a deadly trouble that threatens to burn the town to the ground.
Dwight and Nathan clash over what to do about Mara; Dwight wants her to end the troubles at any cost, but Nathan is convinced that Audrey is in there.
When Vince and Dave travel to North Carolina, their probing of Dave's past uncovers a body-swapping problem back in Haven.
Mara capitalizes on the latest crisis, forcing Duke and Nathan to roll the dice to get Audrey back in a dangerous gamble.
A paranormal trouble tears Audrey and Nathan apart just after they were reunited.
Audrey must call in outside help as she is no longer immune to the troubles and Nathan may be lost forever.
When Audrey and dozens of Haven citizens are affected by a mysterious illness, the symptoms threaten to expose Haven’s secrets to a dangerous newcomer.
Haven’s heroes are torn over how to deal with an inquisitive CDC scientist, who could expose the secret of the troubles to the world, but may be hiding her own dark agenda.
Duke’s roiling troubles and a new threat to Audrey force them each to seek the help of potentially dangerous allies.
When a trouble drives Haven’s citizens to pursue their more primal desires, it takes everyone to keep Haven from coming unglued-distracting them from the menacing storm that is brewing.
As Mara'a endgame becomes clear, Nathan and Audrey pursue a plan to stop her once and for all.
Dwight struggles to maintain order when Duke's trouble wreaks havoc around town; at the same time, Audrey and Charlotte work together to drive away a mysterious fog that has everyone trapped in Haven.
Desperate conditions in Haven lead to a terrified population that's difficult for Dwight to maintain control over; at the same time, Nathan assembles a task force to restore power to the town; and Audrey tries to put an end to the trouble once and for all.
Dwight and Charlotte work to clear Nathan's name when the citizens of Haven put the lawman on trial. Hoping to buy them time, the brothers Teagues moderate the courtroom proceedings, while Audrey continues her quest to solve the darkness troubles.
Dwight and Charlotte work on a way to free Audrey from the Sandman's stasis before he can trap her in his mind forever; at the same time, Duke tries to help Darkside Seeker Seth Byrne recover his memories of Haven.
Charlotte and Audrey work on their new plan to eliminate the troubles, but something seems to be thwarting their attempts, and it's up to Nathan and Dwight to get to the bottom of it. Meanwhile, the Teagues brothers search for the mysterious serial killer who's stalking the streets of Haven.
Nathan receives otherworldly help as he works to track down a terrifying killer; and Duke reaches a crossroads after he has an alarming vision of Haven's future.
Nathan and Vince travel back to the year 1983 in order to discover Croatoan's origins in Haven; at the same time, Duke finds himself in grave danger after being apprehended by a mysterious foe.
Nathan encounters an old adversary after entering the terrible Void; Audrey and Duke deal with the threat of a newly troubled person who wants revenge; at the same time, Dwight tries to help Vince free Dave from Croatoan's grip.
While Duke tries to convince Hallie to reopen the thinny, Nathan tries to escape from the Void where he and William are trapped. Meanwhile, Dave must consider making the ultimate sacrifice to stop Croatoan.
Plans for building a new barn are complicated when an old trouble brings the Haven Police Station to life. It's up to Audrey and Nathan to find a way to regain control, but their efforts are hampered when a mysterious killer leaves a wake of bodies right under their noses.
Nathan and Dwight race to rescue Audrey from Croatoan, but the consequences of Duke's dark destiny wreak havoc on their plans. Meanwhile, Vince contemplates an unusual sacrifice.
Hope of ending the troubles begins to fade as the heroes struggle to rebuild the Barn in the face of mounting obstacles. And while Dwight is tempted by a surprise gift, Nathan finds himself considering a devastating sacrifice.
Duke is ejected from the barn and rescued by a young woman; Audrey is missing and the Troubles are worse than ever.
As charred bodies are uncovered around Haven, Duke must refocus Nathan to solve the case at hand.
Nathan and Dwight race to search for the trouble behind a series of exsanguinated corpses; Duke must convince his half-brother to leave Haven before he learns the truth of the Crocker family trouble.
Nathan and Dwight investigate missing children linked to an ancient legend, while Duke tries to find Audrey by focusing Jennifer's trouble.
Lexie, the new girl in town, joins Nathan on a hunt for a deadly trouble that changes its victims' personalities.
Nathan, Duke, and Lexie find themselves in a race against time to find the troubled person responsible for turning people hard as stone.
Nathan and Lexie hunt a trouble that attacks Haven's citizens in their nightmares; Duke deals with the nightmare his brother has become.
A deadly sea trouble threatens to crush the town.
Audrey believes the thugs from the barn are holding William as a hostage.
Audrey finds herself in a different Haven where troubles don't exist.
The Seekers follow a monster to Haven; their presence threatens to reveal the town's troubles to the entire world.
William is determined to convince Audrey of the truth behind her origins; a seemingly unstoppable curse is unleashed.