Top 6 in Top 10 detective Kdramas you must watch once in your life.
FMV
Alternately titled Bad Detective, Less Than Evil is about a lonely veteran detective who straddles the line between good and evil. He crosses paths with a female psychopath but due to lack of evidence, he is unable to arrest her, until that woman ends up being the one to help him solve his cases. The series is based on the British crime drama titled Luther starring Idris Elba.
Main actors: Shin Ha Kyun, Lee Seol, Park Ho San, Kim Gun Woo