Psychopath Diary is really worth your time and let me tell you why. The series is both a comedy as well as a thriller and it excels in both genres. The tense scenes of the series truly keep you engaged because there is a variety in how the series handles tension. At some points, you can accurately guess what is going to happen next, but then the series still surprises you with something new! The balance between the comedy and thriller genres is well done too, and the show doesn't always take itself too seriously. And that works perfectly.

The acting is outstanding too. All actors and actresses portray the characters convincingly and the casting is therefore perfect. Park Sung Hoon is super convincing in his role. With minimalistic changes in his facial expressions or his body language, he manages to be incredibly threatening and intimidating. Yoon Shi Yoon is also perfect for his role. He can easily switch from one side of his character to the other without losing the baseline of what makes his character that character (sorry if that is too vague, but I want to keep this review as spoiler free as possible). Jung In Sun is, again, also perfectly cast. Although her character is one of the more serious ones, she too brings fun and tension to her character, making her lovable too. Of course, the supporting cast has done an amazing job as well. All performers truly belonged in their roles.