Those Who Kill is a Danish format based on the bestselling work of author Elsebeth Egholm. A&E has secured the U.S. format for the critically acclaimed crime series in Denmark. The series is about violent criminals who are surrounded by fear and mystique- the serial killer. When murders are not grounded in traditional motives and patterns of behavior, it takes a very particular kind of person to catch the serial killer; someone who knows and understands the killer's dark side and the fantasies that plague him. Someone like the two lead characters- a police detective that is trying to understand her own mysterious personal connection in to the mind of a serial killer, and a "profiler" (forensic psychiatrist), who both in very different ways possess a deep psychological understanding that connects them to the killer's victims and to the killer himself, driving them to pursue each case to the end of the line, again and again.