FBI agent Audrey Parker travels to the town of Haven to investigate the death of an escaped prisoner who fled to his hometown. She soon discovers the man's death is merely the tip of a very large iceberg of supernatural phenomena.

Haven is stricken by a mysterious plague when animals and plants alike are destroyed by exposure to hydrochloric acid with no discernible source.

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.

Audrey remains in Haven to investigate her mother's connection to the Colorado Kid, but ends up working with Nathan to determine the cause of a mysterious series of incidents that involve butterflies and otherworldly phenomena centered on a angry reverend, his passive daughter, and her foster son.

Young men in Haven start aging at an accelerated rate, and Audrey and Nathan attempt to find the source.

Duke’s roiling troubles and a new threat to Audrey force them each to seek the help of potentially dangerous allies.

Nathan and Audrey investigate a series of murders, but the prime suspect insists that she's trying to stop the real killer. Meanwhile, in the aftermath of Duke's revelation, Audrey continues to investigate the Colorado Kid mystery involving her mother.

A wedding at an isolated estate turns deadly for the guests when the site becomes sealed off and something attacks from within.

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.

Audrey and Nathan learn of a ghost story that wanders the Haven clinic and takes the lives of sick people before their time.

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.

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.

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.

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.

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.

Audrey's surprise birthday party at a local hotel goes awry when a shapeshifter stalks the partygoers, and nobody knows who can be trusted.

The town's docks start attacking people while the other Audrey Parker probes Audrey's identity crisis.

When a deadly series of electrocutions occur around town, Audrey and Nathan investigate the cause

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.

Lexie, the new girl in town, joins Nathan on a hunt for a deadly trouble that changes its victims' personalities.

Nathan and Lexie hunt a trouble that attacks Haven's citizens in their nightmares; Duke deals with the nightmare his brother has become.