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.
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.
Nathan struggles to return to Haven as Dwight reconsiders his future in the series finale, which also finds Audrey coming to a terrifying decision about how she might finally save the town from Croatoan.
As Audrey grapples with her fate; at the same time she, Nathan and Duke prepare for a showdown with the Bolt Gun Killer.
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.
As Mara'a endgame becomes clear, Nathan and Audrey pursue a plan to stop her once and for all.
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.
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.
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 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.
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.
As charred bodies are uncovered around Haven, Duke must refocus Nathan to solve the case at hand.
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.
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.
Audrey must call in outside help as she is no longer immune to the troubles and Nathan may be lost forever.
Mara capitalizes on the latest crisis, forcing Duke and Nathan to roll the dice to get Audrey back in a dangerous gamble.
When Vince and Dave travel to North Carolina, their probing of Dave's past uncovers a body-swapping problem back in Haven.
Audrey fights to remain herself as she tracks down William to sever their ethereal connection
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 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.
Audrey finds herself in a different Haven where troubles don't exist.