And when Ichabod tags along to a crime scene, he immediately suspects a supernatural force was behind the deaths and sets out to prove his theory with the help of some dragon's breath he picked up on his travels.
"Something you picked up in duty free?" Abbie jokes.
But neither of them are laughing after what happens next. Check it out in the exclusive sneak peek above.
Sleepy Hollow airs Thursdays at 9/8c on Fox.