The Worst of Evil

Composer

• 
  Noh Hyeong Woo

Director

• 
  Han Dong Wook
• 
  Park Geun Beom

Producer

• 
  Han Jae Deok

Screenwriter

• 
  Jang Min Seok

Main Role

• 
  Ji Chang Wook

  Park Jun Mo / Kwon Seung Ho

  Main Role
• 
  Wi Ha Joon

  Jung Gi Cheol

  Main Role
• 
  Im Se Mi

  Yoo Ui Jeong

  Main Role

Support Role

• 
  Cha Rae Hyoung

  Hong Hui Seong [Gangnam Union's member]

  Support Role
• 
  Im Sung Jae

  Choi Jeong Bae [Gangnam Union's member]

  Support Role
• 
  Lee Shin Ki

  Seo Jong Ryeol [Gangnam Union's member]

  Support Role
• 
  Ji Seung Hyun

  Seok Do Hyeong [Detective]

  Support Role
• 
  Lee Jung Hun

  Cho Chang Sik [Prosecutor]

  Support Role
• 
  BIBI

  Lee Hae Ryeon

  Support Role
• 
  Bae Myung Jin

  Bae Yong Dae [Gangnam Union]

  Support Role
• 
  Yoon Kyung Ho

  Hwang Min Gu [Detective]

  Support Role
• 
  Choi Seong Hyuk

  O Gyeong Jin [Gangnam Union's memeber]

  Support Role
• 
  Park Min I

  Han Do [Sergeant Jang's gang]

  Support Role
• 
  Park Ji Hoon

  Cho Gang San [Donghobang / Hae Ryeon's bodyguard]

  Support Role
• 
  Lee Han Ju

  Jung Byeong U [Gangnam Union's member]

  Support Role
• 
  Dokgo Young Jae

  Song Dong Hyeok [Busan Gang leader]

  Support Role
• 
  Jung Ui Kap

  Kang Gun [Busan Gang's member]

  Support Role
• 
  Park Sang Hoon

  Seong Gi Su [Jaegeon Gang's leader]

  Support Role
• 
  Woo Kang Min

  Bok Nam [Jaegeon Gang's member]

  Support Role
• 
  Han Yi Jin

  Cheol Gon [Jaegeon Gang's member]

  Support Role
• 
  Ye Soo Jung

  Yun Won Gil ["Professor" / Donghobang]

  Support Role
• 
  Ki Kook Seo

  Kanemoto [Yakuza's leader]

  Support Role
• 
  Im Hyung Guk

  Tsuyoshi Oyama [Yakuza]

  Support Role
• 
  Shin Sung Il

  Cheon Jin Pyeong [Private investigator]

  Support Role
• 
  Min Kyung Ok

  Hwang Jin Suk [Ui Jeong's mother]

  Support Role
• 
  Park Jae Chul

  Hyeong Gu [Sergeant Jang's Gang member]

  Support Role
• 
  Kim Geum Soon

  Yoo Seung Ok [Gi Cheol's mother]

  Support Role
• 
  Yoon Jung Sub

  Detective Sin

  Support Role
• 
  Jung Jae Hun

  Detective Kim

  Support Role
• 
  Kim Bum Soo

  Detective Ko [Min Gu's partner]

  Support Role
• 
  Na Joo Ho

  Detective Han

  Support Role
• 
  Ha Seo Yoon

  Min Ju

  Support Role
• 
  Lee Ro Woon

  Choi

  Support Role
• 
  Cho Yu Jin

  Lee Jin Hwa

  Support Role
• 
  Zelo Support Role
• 
  Chunji Support Role
• 
  Oh Seo Jung Support Role

Guest Role

• 
  Jeong Man Sik

  Jang Gyeong Cheol [Sergeant] (Ep. 1)

  Guest Role
• 
  Jung Jae Kwang

  Kwon Tae Ho [Gangnam Union's member / Ki Chul's best friend] (Ep. 1)

  Guest Role
• 
  Kim Moon Chan

  [Eumseong squad chief] (Ep. 1)

  Guest Role
• 
  Song Chi Hoon

  [Sikgaek manager] (Ep. 1)

  Guest Role
• 
  Oh Ki Deok

  Yeong Pyo [Detective] (Ep. 1, 11)

  Guest Role
• 
  Kwak Hee Joo

  Cha Bong Ju (Ep. 2)

  Guest Role
• 
  Go In Beom

  [Kwon Tae Ho's father] (Ep. 2)

  Guest Role
• 
  Shin So Hyun

  Yoo Ui Jeong [Young] (Ep. 3)

  Guest Role
• 
  Seo Jun

  Jung Gi Cheol [Young] (Ep. 3)

  Guest Role
• 
  Jang Myung Gap

  Section Chief Lee (Ep. 3)

  Guest Role
• 
  Kwak Na Yeon

  [Caregiver] (Ep. 3)

  Guest Role
• 
  Geum Kwang San

  [''Baby'' / Manager Cho's gang member] (Ep. 3, 6)

  Guest Role
• 
  Kim Seo Won

  Manager Cho (Ep. 3, 6)

  Guest Role
• 
  Choi Kwang Je

  Smith [Manager Cho's gang member] (Ep. 3, 6)

  Guest Role
• 
  Lee Seung Heon

  [Prosecutor] (Ep. 5)

  Guest Role
• 
  Kim Wook

  Lee Hyang Jin [Actor / Addict] (Ep. 7)

  Guest Role
• 
  Song Yo Sep

  [Gangnam Station chief] (Ep. 7)

  Guest Role
• 
  Jo Eun Ji

  Ms. Cho [Records clerk] (Ep. 7-8)

  Guest Role
• 
  Lee Chan Hee

  "Dodgers" [Drug dealer] (Ep. 7, 9-10)

  Guest Role
• 
  Jo Duk Hyun

  Park Jae Man [Joon Mo's father] (Ep. 9-10)

  Guest Role
• 
  Sa Min Kyung

  "Wild Rose" [Addict] (Ep. 10)

  Guest Role
• 
  Seo Yi Ra

  Wendy [Yankees' girlfriend / Addict] (Ep. 10)

  Guest Role
• 
  Park Boo Gun

  Captain Ko [Yakuza] (Ep. 12)

  Guest Role
• 
  Lee Jae U

  [Hwang Min Gu's colleague] (Ep. 12)

  Guest Role
• 
  Cha Hee

  [Seok Do Hyeong's wife] (Ep. 12)

  Guest Role
• 
  Joo Ho Sung

  Yoo Deok Hun [Ui Jeong's father]

  Guest Role
• 
  Takagawa Yuya

  Hideaki Murayama [Japanese police]

  Guest Role
• 
  Song Deok Ho

  "Yankees" [Gangnam Union's member]

  Guest Role
• 
  Seon Yul U

  [Sergeant Jang's Gang member]

  Guest Role
• 
  Lee Gi Na

  [Sports car girl]

  Guest Role
• 
  Ham Jin Sung

  [Reconstructionist]

  Guest Role
• 
  Kim Hee Sung

  Jin Woo [Joon Mo's nephew]

  Guest Role
• 
  Jo I Taek

  [Donghobang member]

  Guest Role
• 
  Song Ha Na Guest Role