First of all the story was really cool, i really liked the crime part of it. The idea of having an organisation full of murderers is just PERFECT. The chemistry between the leads is so good. Not to forget all the murderers were fantastic presented , their sharacters and why they became criminals was really good made. 3 seasons, but each season is unique and becomes more and more interesting. And I loved the ending, that they really dedicate several episodes to show us the past and not a simple shortened flashback.