We are two seasons into Netflix's Mindhunter now. The series, centred firmly on some of America's most infamous serial killers, has captured quite the following.
While the story revolves around agents Holden and Tench and their ongoing sub-plots, the main attraction for most viewers is the interaction with the likes of Ed Kemper, Richard Speck, and Charles Manson.
Despite committing horrific crimes - which in no way should be glorified - there's definitely something intriguing about the mental state and thought process that drives these people to carry out such atrocities.
Series creator Joe Penhall does a good job of keeping the viewer in suspense and invested in all aspects of the show, without revealing or displaying too much brutality in the way of actual scenes. It would arguably take away from what the focus of what the programme is about if we did see murder after murder in front of our eyes. Mindhunter is, after all, meant to introduce the viewer to how the FBI came to develop criminal profiling.
And while we get an insight into just how some of the world's most heinous serial killers operate, not everything is given away.
These are equally interesting and disturbing people and there's even more out there to delve into if you look a little closer at their characters...