S01:É01 - S01:E01 - Episode 1
An undercover detective is murdered, and the chief of police summons Oh Gu-tak to investigate.
S01:É02 - S01:E02 - Episode 2
Tasked with catching the Northeast Serial Killer, the Bad Guys each begin their own investigations.
S01:É03 - S01:E03 - Episode 3
The Bad Guys launch a full-scale investigation to find a victim of organ trafficking.
S01:É04 - S01:E04 - Episode 4
The Bad Guys uncover the shocking truth behind an underground human trafficking organization.
S01:É05 - S01:E05 - Episode 5
The Bad Guys are tasked with catching a serial shooter who has killed 12 people.
S01:É06 - S01:E06 - Episode 6
Woong-chul is kidnapped and almost buried alive by Doo-gwang. The Bad Guys go to investigate.
S01:É07 - S01:E07 - Episode 7
Contract killer Lim Jong-dae is murdered, and Woong-chul gets a request to assassinate Jung-moon.
S01:É08 - S01:E08 - Episode 8
A mercantile agency employee reveals a shocking truth about the murdered daughter of Gu-tak.
S01:É09 - S01:E09 - Episode 9
Gu-tak is suspected of wanting Jung-moon dead, and Mi-young interrogates him.
S01:É10 - S01:E10 - Episode 10
The reason Gu-tak started the Bad Guys is revealed, and East Gang boss Doo-gwang is found dead.
S01:É11 - S01:E11 - Episode 11
The Bad Guys turn on one another, and the police chief is attacked as all secrets are revealed.