Mitch and Jamie try to disrupt Davies' plans and are helped by two unexpected allies. Meanwhile, Jackson and the others meet with Robert's sponsors in Pangaea and try to develop a cure.
While Mitch and Jamie work together when animals attack the Russian embassy, Robert provides an explanation to Jackson as Davies' people close in on the jet.
While Mitch and Abe try to find Jackson, Allison and Jamie meet with the Russian Minister of Defense and try to convince him to withdraw his country from the Noah Objective.
While Mitch and Jackson try to recover a clue to the cure from Jackson's memories, the others head to New England to follow a new lead.
After reuniting with Jamie, the team travels to Portugal to obtain some jellyfish venom in search of a cure for the animal mutation. Meanwhile, Jackson's mutation begins to endanger his teammates.
While Jackson and Abraham travel to a remote island to find Robert's research, Jamie convinces Mitch to go to New Orleans with her to present the case against Reiden. Meanwhile, wolves launch an attack on a prison, and Gaspald shows Jamie the crime scene in Slovenia.moreless
Jackson rescues Abraham and talks with the local doctor--his mother Elizabeth--who confirms that the lions killed their victims as slowly and painfully as possible. In Slovenia, a British couple adopt a young boy and take him to the circus to see the tigers. And in Paris, Chloe meets with a mysterious man who offers her answers.moreless
Two fatal lion attacks, thousands of miles distant, are the first indications of a threat that could wipe out all humanity.
Trapped in the past, Abbie tries to convince Ichabod that they are future partners while trying to stop Katrina from assuring the Horseman's victory.
Ichabod and Abbie try to stop Henry's scheme to use a mystic bell to create a new cult of witches. However, they learn that he has an unexpected ally. Meanwhile, Irving comes after Jenny.moreless
Ichabod and Abbie find a new series of tunnels beneath Sleepy Hollow and have an encounter with an old friend of Ichabod's. Meanwhile, Katrina receives a visit from Henry, and Jenny receives a visit from Irving.moreless
Solomon Kent, a warlock who set off the Salem Witch Trials to protect himself, seeks out a Grimoire that will give him the power to undo the mistake in his past that turned him into a warlock. Meanwhile, Irving approaches Abbie, while Henry contemplates his past and decides on his future.moreless
Nick's godmother, the woman who raised him after his parents died, asks for his helping stealing a mystic artifact. He reluctantly agrees, putting him at odds with Abbie, Ichabod, and Jenny. Meanwhile, Irving is cleared of the charges against him but Cynthia still has concerns.moreless
Ichabod and Katrina attend the Sleepy Hollow Historical Soiree and become embroiled in a murder. Meanwhile, Abbie receives an unexpected visit.
While questioning their purpose now that Moloch is dead, Ichabod and Abbie discover that a group of demons have escaped from Purgatory... as has an angel, Orion. Meanwhile, Katrina offers Abraham the chance to restore his humanity.moreless
The End of Days draws nigh, and Ichabod and Abbie capture Abraham in the hopes of learning where they can find Moloch and Henry. However, Abraham reveals that the Sword of Methuselah can only be used at a terrible cost.moreless
Abbie and Jenny investigate strange suicides at Tarrytown that may be connected to their mother Lori. Meanwhile, Katrina realizes the nature of the baby and prepares to banish it back to Purgatory.
Ichabod and Abbie join forces with Katrina to take on a succubus that Henry has sent out to drain the life force from her victims, killing them.
Henry brings in a doctor to monitor Katrina's condition after her sudden illness. She manages to escape and Ichabod finds her, and they realize that Moloch has a new plan to manifest on Earth. To stop him, Ichabod reaches out to Henry to use his powers to save his mother.moreless
Corbin's son Joe returns from overseas after receiving an honorable discharge after his platoon is wiped out in a bizarre attack. Ichabod and Abbie soon realize that something is wrong with him. Meanwhile, Henry tells Irving that there is a way for him to free his soul, but it has a cost that Irving may not want to pay.moreless
A ghostly spirit, the Weeping Lady, kills Ichabod's friend Caroline. After it attacks Abbie, Ichabod realizes that the ghost is going after his loved ones... and Katrina is her next intended victim.
When a child in Sleepy Hollow goes missing, Ichabod and Abbie realize that a Pied Piper-like creature that serves Moloch is responsible.
Ichabod and Abbie discover that Henry is trying to spread a curse of violence, unleashing the darkness in individuals so that they kill. Meanwhile, Jenny discovers who was responsible for her mother's imprisonment at Terrytown, and Frank learns the truth about his lawyer.moreless
To defeat the Horseman, Ichabod and Abbie seek out a patchwork man that Franklin and the Sisterhood built to oppose Moloch's servants. Meanwhile, the new sheriff arrests Jenny and Frank explains that demons killed his supposed murder victims.moreless
With Ichabod buried alive and Abbie trapped in Purgatory, Ichabod's son, the Horseman of War, has free reign over Sleepy Hollow... and soon, the world.
The two worlds collide as Sleepy Hollow is rocked to its core in the final battle between Good and Evil.
Abbie and Ichabod must find a way to fight an evil spirit that can possess people.
While attempting to communicate with Katrina in Purgatory, Ichabod and Henry Parrish unwittingly unleash a new evil.