5. Dead Men Tell No Tales

Pandora reanimates General Howe and his soldiers as revenants, sending them to march on Sleepy Hollow during Halloween. Crane and Abbie break into Howe's grave, where they find mysterious bone fragments. Aided by Abbie's FBI contacts, Special Agent Seeley Booth ( David Boreanaz ) and Doctor Temperance "Bones" Brennan ( Emily Deschanel ), they trace the bones to an underground tomb beneath the Capitol, which was supposedly built for Washington and contains a prototype version of Greek fire, which Brennan mistakes for napalm. Using the fire, they destroy Howe and his men in the sewers. Although aware of Pandora's role in Howe's resurrection, Ichabod and Abbie are unaware that another flower has bloomed on her tree. This episode concludes a crossover with Bones that begins on " The Resurrection in the Remains ", which features appearances by Ichabod and Abbie.