A very well put together 12 part series covering some horrific crimes in South Korea. Set in 1990 up to 2007 and based on a book of experiences of a famous Korean Profiler. Over 12 episodes it charts their infancy as a behavioural unit and the lack of support , funding or understanding from their police colleagues as to their relevance to each investigation. Hard to watch at times when some of the crimes were being recounted by the killers. I can imagine the real profilers didn't have an easy job. Superb cast in this with some familiar faces and a few new ones. The 2 male profiler leads are outstanding !!! Their facial expressions and studious examination of each case just pulls you in and you are rooting for them to catch the killer. I really hope there is a second series. We'll done everyone. Superb series !!!