When Pandora uses her powers to unleash a new form of evil, Abbie and Crane are forced to face their pasts in unexpected ways.

More powerful than ever, Pandora unleashes her most evil force yet. Meanwhile, Abbie and Jenny work together when the latest monster targets the children of Sleepy Hollow.

When Reynolds heads to D.C. to discuss developments in the Nevins case, Abbie is left in command. Jenny and Joe deal with unexpected consequences as a result of stealing the shard, which leaves both the lives of the heroes and Abbie's career in great peril. Meanwhile, a new, more dangerous evil force is revealed.

In the quest to save Abbie, Crane and Sophie are forced to battle a supernatural force targeting the citizens of Sleepy Hollow, while Pandora and The Hidden One only grow stronger. Meanwhile, in an effort to find out what truly happened to her sister, Jenny faces an old foe: her father. Can our heroes solve their most personal case yet?

Ichabod discovers that the creature that inspired the stories of the Jersey Devil. Meanwhile, Joe and Jenny reach a possible hurdle in their relationship.

As The Hidden One grows stronger, Crane must examine his past with Betsy Ross to find the key to stopping him. Meanwhile, Jenny wonders if she can ever have a relationship with her father, and Abbie faces a hard decision as things with Reynolds become more strained.

After a startling discovery, Abbie and Crane realize what they must do in order to make Pandora’s box complete again. Meanwhile, the team works tirelessly to stop The Hidden One, before he destroys all of humanity. Can the Witnesses succeed with the fate of the world in their hands once again.

Dreyfuss finally garners enough power to infiltrate the White House, and his group of minions grow strong enough to take action. Can Team Witness stop Dreyfuss in time?