Duke makes a deal with Mara so he won't destroy Haven. However, Nathan needs Mara to cure Audrey. Meanwhile, Charlotte reveals the secret of Mara and Audrey's existence, and Dave and Vince try to find out the source of Dave's visions.moreless
When someone abducts Mara, Duke goes looking for her and crosses paths with Nathan. Meanwhile, Vince and Audrey try to find the proof they need to convince Dwight that Charlotte is not who she claims to be.moreless
As Duke threatens to explode from the Troubles that he contains, he turns to the only person who can help him: Mara. Meanwhile, audrey tries to deal with a new Trouble while her illness grows ever more debilitating.moreless
While Dwight tries to convince Charlotte that she shouldn't call in the army, Nathan and Audrey race to find a cure for the illness striking the Troubled people in Haven. Meanwhile, Duke frees Mara.moreless
Dwight befriends Charlotte Cross, the CDC doctor sent to Haven to investigate Dave's biopsy sample. But dancing bears and a mysterious infection threaten to expose the town's secrets to the world. Meanwhile, Mara convinces Duke that his friends are turning against him.moreless
Audrey calls in help from the Darkside Seekers to find a way to communicate with Nathan. However, to learn what they need to bring him back, Duke has to agree to an unusual deal with Mara. Meanwhile, the hospital takes a sample of the infection on Dave's leg, and the analysis may endanger Haven's secrets.moreless
Nathan and Audrey are finally reunited but at a cost. However, their reunion is short-lived when Nathan is seemingly killed by a localized nuclear blast... only to find himself transformed into a ghost.moreless
After the newest Troubled person switches their minds, Duke and Nathan try to use the circumstance to their advantage to fool Mara. she soon realizes what they're up to, forcing them to risk everything on one last, desperate plan. Meanwhile, Dave and Vince learn more about the circumstances of Dave's adoption in North Carolina.moreless
While Dave and Vince travel to North Carolina to explore the circumstances of Dave's adoption, a new Trouble strikes Haven. Meanwhile, Nathan takes a different approach to try and bring Audrey back.
Mara offers to cure the Troubles in return for Dwight's help recovering the aether that William hid. Meanwhile, Duke is plagued by a new Trouble, while Vince and Dave seek help to recover the memories they lost in the cave.moreless
Nathan abducts Mara on his own so that he can bring Audrey back out... and keep the Guard from killing Mara. Meanwhile, Duke's friend suffers from a fatal Trouble and he needs Mara to cure her... and himself, as the Troubles within eat away at him.moreless
While Duke's new Trouble runs rampant, Nathan sets out to capture Mara and turn her over the Guard in the hope that they can make her undo the Troubles. Meanwhile, Vince and Dwight disagree over the leadership of the Guard as Vince tries to deal with Dave's injuries.moreless
Mara, occupying Audrey's body, goes on a rampage to find a way back to her own world. Meanwhile, a new Trouble with an old history strikes the residents of Haven, and Duke suspects that he might be the one responsible.moreless
While Audrey draws ever closer to losing herself, the others try to open the door and send William back.
When Audrey won't accept that she helped create the Troubles, William unleashes a new Trouble-related curse on Haven.
The Darkside Seekers' presence in Haven threatens to reveal the existence of the Troubles to the world.
A Troubled individual ends up creating a new reality where the Troubles never existed. Audrey is the only one who is immune and tries to convince Duke and Nathan that she's not insane. However, things become complicated when William, who has a similar immunity and is also trapped, tries to find a way to reverse the situation.moreless
Lexie's attackers from the Bar reveal themselves and their hostage--William--in Haven. To stop them, Audrey must rescue William if she hopes to find out the source of the new Troubles plaguing the town.moreless
An ocean-related Trouble brings the crushing pressure of the depths to Haven, while Audrey and Nathan discover that the residents' Troubles are mutating.
Audrey and Nathan go after a Troubled who can enter people's dreams, while Duke hunts down his brother.
While the mystery of Lexie continues, she helps Nathan and Duke try to find a Troubled person who can petrify their victims.
Nathan gets a new partner as he tries to track down a Troubled person who can change its victims' personalities.
Children in Haven begin disappearing and the cause may be related to an ancient legend. Meanwhile, Duke and Jennifer try to pinpoint Audrey's location.
Interviews with Maria Menounos and Eric Balfour; Musical guest Irontom.
While Duke tries to convince Wade to leave Haven, Nathan and Dwight investigate murders where the victims are drained of their blood.
When a Troubled immolates the citizens of Haven, Nathan and Duke have to take time off from their search for Audrey to deal with it.
Six months after the Barn disappears, Duke reappears in Boston. He meets a woman who claims that she can hear the voices from the Barn, and takes her back to Haven to try and find Audrey. The Troubles haven't ended, and the townspeople blame Nathan, who is living as drifter because the Guard wants him dead. As they deal with a Troubled person whose ability has come back, Audrey resurfaces... as a bartender named Lexie.moreless