Season 1
11 episodes
1. Episode 1
1. Episode 1
An undercover detective is murdered, and the chief of police summons Oh Gu-tak to investigate.
2. Episode 2
2. Episode 2
Tasked with catching the Northeast Serial Killer, the Bad Guys each begin their own investigations.
3. Episode 3
3. Episode 3
The Bad Guys launch a full-scale investigation to find a victim of organ trafficking.
4. Episode 4
4. Episode 4
The Bad Guys uncover the shocking truth behind an underground human trafficking organization.
5. Episode 5
5. Episode 5
The Bad Guys are tasked with catching a serial shooter who has killed 12 people.
6. Episode 6
6. Episode 6
Woong-chul is kidnapped and almost buried alive by Doo-gwang. The Bad Guys go to investigate.
7. Episode 7
7. Episode 7
Contract killer Lim Jong-dae is murdered, and Woong-chul gets a request to assassinate Jung-moon.
8. Episode 8
8. Episode 8
A mercantile agency employee reveals a shocking truth about the murdered daughter of Gu-tak.
9. Episode 9
9. Episode 9
Gu-tak is suspected of wanting Jung-moon dead, and Mi-young interrogates him.
10. Episode 10
10. Episode 10
The reason Gu-tak started the Bad Guys is revealed, and East Gang boss Doo-gwang is found dead.
11. Episode 11
11. Episode 11
The Bad Guys turn on one another, and the police chief is attacked as all secrets are revealed.
