I just finished this one and I gotta give this show an A+++! Starting from the exciting pilot since - as far as I`ve seen - they (pilots) tend to be quite boring. I really don`t get what happens with pilots in Korea, honestly... Ahem. It was completely well constructed, enticing, well written and carries the right levels of comedy to lighten up the theme. When I first read the synopsis I thought this would be another ID crisis show and though the pilot didn`t fully deny my theory I was still excited to see what was truly going to happen. Another thing I loved about this show is the lack of irrelevant scenes such as the side romance. I really really love how they didn`t give that too much focus or it would spoil the plot imo. Oh... the bromance though.... that was beautiful! On the other hand... all that soft side of psycho-killers... that`s pretty much scy-fi. However, I won`t judge it for how real it was. The impression we get is that Korean laws are ridiculously weak and don`t work at all if you give it a closer look not only on this drama but many others. I haven`t watched anything where it`s further explored so I can`t say for sure but I can say for sure that the law isn`t that easy around here... Anyway... the acting wasn`t brilliant by some, the lack of chemistry between them didn`t bother me since it wasn`t important anyway, you won`t see worse cops ever!, everyone seemed to be too willing to forgive serial murders - me included, i must admit... they worked hard on this - but these are minimal flaws compared to how great and entertaining this show was. The actions scenes are very smooth, the supporting cast stole the spotlight with great performances and should I even mention Kyungsoo? Nah... I don`t think it`s necessary. #satansoo was made for this role. And the OST.... God. It`s flawless! Remember had me shivering. In the end I was surprised by the events. It wasn`t as I thought and it I was not disappointed though things didn`t go the way I wanted here and there. I can only hope for a sequel: I still remember you, maybe?