FOX has released six different sneak preview clips of tonight's episode of Sleepy Hollow, which is called "Necromancer." In the first preview clip, Ichabod comes face-to-face with his nemesis and is shocked by game-changing information about the Horseman's true motive. In the second preview clip, Ichabod, Abbie, Captain Irving and Jenny Mills (guest star Lyndie Greenwood) join forces and interrogate the Headless Horseman. In the third preview clip, Abbie suggests that Headless may agree to talk to someone who's already dead. In the fourth preview clip, Ichabod reclaims Katrina's necklace from Headless, whose necromancer (guest star John Cho) immediately suffers. In the fifth preview clip, Katia breaks off her engagement for Ichabod, but she has serious doubts about either side's role in the Revolutionary War. In the sixth preview clip, Despite all of their attempts to kill him, Headless stands before Ichabod, Abbie and Captain Irving as monstrous as the man Ichabod met on the battlefield more than two centuries ago In "Necromancer," Ichabod, Abbie, Captain Irving and Jenny Mills (guest star Lyndie Greenwood) join forces and face the Headless Horseman. While staring down this nemesis, Ichabod is shocked by game-changing information about the Horseman's true motive. The "Necromancer" episode of Sleepy Hollow airs on Monday, November 18 from 9:00-10:00 PM ET/PT on FOX.