When Ichabod and Abbie investigate a missing persons case, the search leads to a colonial-era house which holds secrets from Ichabod’s past...and unleashes a long-dormant evil.

Ichabod enlists Henry Parrish to help him communicate with Katrina, but in the process, a menacing danger is unleashed from purgatory.

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.

Ichabod and Abbie discover a massive secret buried within the pages of George Washington’s Bible and unearth the shocking true nature of the founding father’s death. Meanwhile, Captain Irving makes a near-impossible decision for the sake of his beloved family that drastically changes his future.

After the mysterious death of an art restorer at the Sleepy Hollow Historical Society Soiree, Ichabod and Katrina are reminded of a dear friend from their past - Abigail Adams. Meanwhile, Abbie is shocked by someone's visit to the police precinct.

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(?)