If you want something that's just as thrilling, something that will have you on edge, do give this a watch. The actors and actresses did an outstanding job from beginning to end. The episodes are a little longer than usual, but amount of episodes is short. As a fan of crime and thriller dramas, I highly recommend this. (I also can't wait for Bad Guys 2, which supposedly is to be airing soon this year. Better watch this one before the new one comes out, ey?)
If you want some action, crime, thriller, investigation, and a detective story, you've got to watch this too. Both of the teams are tasked to catch someone. In bad guys, POLICE +CRIMINALS. In hidden identity: SECRET AGENTS who go undercover. There are so many revelations. Expect the unexpected. The main character in hidden identity tries to seek revenge for his girlfriend's death. No love story except for the flashbacks. In bad guys, they identify and catch criminals to shorten their imprisonment. Plus, both series have the SAME DIRECTOR!