My first foray into the world of the K drama was Signal and what a first impression it made. This show his wonderful from its writing to the acting to the haunting soundtrack. Cho Jin-woong was spectacular as Lee Jae-Han. The movie theatre scene is a sight to behold. It really rips your heart out to see how he suffered in that moment. Kim Hye-soo as Cha Soo-hyun was a true paradox of the hard boiled detective who was very vulnerable when it came to Lee Jae-Han. As the profiler, Lee Je-hoon was excellent as the conflicted police officer fighting with his own past and the death of his brother. Jang Hyun-sang as the main antagonist was great and made it more satisfying to see his comeuppance at the end. There isn't anything about this series I could fault.