Book excerpt: This collection of new essays examines how the injection of supernatural creatures and mythologies transformed the hugely popular crime procedural television genre. These shows complicate the predictable and comforting patterns of the procedural with the inherently unknowable nature of the supernatural. From Sherlock to Supernatural, essays cover a range of topics including the gothic, the post-structural nature of The X-Files, the uncanny lure of Twin Peaks, trickster detectives, forensic fairy tales, the allure of the vampire detective, and even the devil himself.