When Capt. Iriving's daughter, Macy, becomes the target of evil forces, he makes a desperate plea to Crane and Mills for help, and seeks answers that lie within Washington's Bible. Meanwhile, a frightening chapter of Jenny's past is revealed.

The battle between good and evil comes to an explosive head – sacrifices must be made, worlds collide, loyalties are tested and the town of Sleepy Hollow will never be the same

Henry sets out to find the Gehenna Key, which will allow his master Moloch to escape from Purgatory with an army of the damned. Meanwhile, Ichabod tries to free himself from his buried tomb, and Jenny must escape the Hessians holding her on Henry's behalf.

Abbie and Crane's search for a missing Sleepy Hollow child reveals a creature akin to the Pied Piper, whose legacy with the child's family extends back to a centuries-old curse.

A woman from Ichabod Crane's past comes to Sleepy Hollow in the form of an un-dead Weeping Lady, aiming to harm anyone in her path. Katrina and Crane learn unsettling things about each other's pasts. Abbie has some unexpected flirtatious encounters.

Abbie and Ichabod learn that Katrina is in imminent danger and race against the clock to help her.

Crane and Abbie set out to take down a succubus whom Henry has sent out to drain the life forces out of its victims.

Ichabod and Abbie set out to find the Sword of Methuselah, the only weapon capable of killing Moloch and ending the coming apocalypse.

Reeling from the events of their standoff with Moloch, Ichabod and Abbie encounter an angel, Orion, that they believe can help them. Meanwhile, Katrina searches for the humanity in Abraham.

With the help of Ichabod, Abbie and Jenny, Nick Hawley faces off against his evil childhood caretaker, and Captain Frank Irving adjusts to his new... life(?)

Ichabod and Abbie face demonic creatures that guard a secret crypt and encounter Thomas Jefferson in their quest to fight evil. Meanwhile, Jenny learns a shocking secret about Frank Irving.

The town of Sleepy Hollow and its inhabitants are permanently changed; a relationship is destroyed beyond repair.