A small-town English teacher is shown a portal through time to 1960... and asked to stop Lee Harvey Oswald from assassinating John F. Kennedy in 1963.
Nathan and the Guard manage to capture Duke, and Nathan tries to get through to his friend. Meanwhile, Croatoan explains his plan to Audrey, and insists that he'll give the people of Haven everything that they've ever wanted... if Audrey cooperates with him.moreless
The citizens of Haven gather at the police station to protect Audrey from Croatoan, but a traitor from within threatens their plans.
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.moreless
While Hallie opens a thinny so that Nathan can enter the Void, one of the new Troubled confronts Duke over what he did to her. Meanwhile, Vince and Dwight discover that Croatoan is killing the Troubled that might break his link to Dave.moreless
Nathan and Vince use a Trouble to travel back in time to 1983 to try and find out how Croatoan was able to kill the Colorado Kid. However, Vince tries to stop the murder, while Nathan meets Lucy. Meanwhile, mysterious men in suits capture Duke and hold him captive.moreless
Dave and Vince try to track down Croatoan, while Dwight, Audrey, and Nathan convince a Troubled woman to bring back Charlotte from the dead. In North Carolina, Duke has a vision of Haven's future.moreless
The town's mysterious killer uses a Trouble to target Nathan, Dwight, Audrey, and Charlotte for death... and to stop them from recreating the Barn. Meanwhile, Duke and Seth search for the mysterious man who can drive the black tar from the bodies of sinners.moreless
The Sandman puts Audrey in a coma and plans to force her to commit to him forever through a wedding ceremony in his dream world. In Massachusetts, Seth investigates reports of a girl phasing through a wall and finds Duke... and has no memory of Duke or Haven.moreless
Nathan secretly tells Dwight and Audrey that Kira is trapped with William's hidden cache of aether, and they can't risk leading the townspeople to it. While Dwight and Charlotte go to free the girl, Nathan stands trial to stall for time until they can come back and prove that Kira is still alive. Meanwhile, Audrey recruits a Troubled man, Grayson, to help her deal with the darkness trouble.moreless
While the townspeople take refuge in the Haven school, a new Trouble stalks them from the darkness. Audrey learns how Dwight is keeping order, while Nathan takes a team on a desperate mission to restore power to the town. Meanwhile, Duke settles into a normal life but discovers that the Troubles have followed him.moreless
After Duke releases a new wave of Troubles, Nathan and Dwight try to help the victims--and their victims--while Audrey and Charlotte look for the man responsible for the fog wall. Meanwhile, Gloria and Vince get Dave drunk in hopes that it will trigger another Croatoan vision.moreless
Big Jim and the other resistance fighters make one last attempt to prevent the Kinship and their new queen from infecting the world outside the dome.
With the dome calcifying, Joe struggles to bring it down before all of the residents suffocate. Meanwhile, Big Jim tries to deal with Hektor, while Barbie and Julia try to save the new queen.moreless
Joe learns more about Christine's plans and decides to help her bring down the dome. Meanwhile, the resistance tries to save their loved ones, and Hektor asks Julia and Big Jim to help him with a cure.moreless
After Julia frees him from the Kinship's influence, Barbie goes back to town hall to find out what Christine and the others are up to. Meanwhile, Hektor rescues Big Jim, Norrie, and Hunter from the attacking Millers, and they take refuge at another of Big Jim's safehouses.moreless
Big Jim and Julia target Barbie and Eva to break Christine's grip on the Kinship. Meanwhile, Hunter finds information on Hektor Martin, the head of Aktaion.
Julia and Big Jim go to blow up the cave when they learn that the crystals are the key to Christine's plan. Meanwhile, Norrie and Joe try to free Carolyn from the Kinship's influence, and Barbie and Eva bond.moreless
As meteors rain down outside of the dome, Eva attempts to convince Barbie to join the Kinship. Meanwhile, Julia and Big Jim share a drink, and Norrie and Joe discover a way to break the townspeople free of Christine's control.moreless
While Marston forces Big Jim to try to find out what Christine has planned, Carolyn recruits Norrie to x-ray Hunter while Junior forces Joe to work for the Kinship.
While Big Jim and Julia join forces against Aktaion and Christine, Christine plots to convert or eliminate those who resist her and her alien influence.
While Christine manipulates the townspeople, Big Jim and Julia learn of a new threat.
Big Jim suspects new residents Eva and Christine of plotting against the town, while the other townspeople try to return to their lives.
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