The Guardians

Assistant Director

• 
  Oh Da Young

Director

• 
  Song Hyung Suk
• 
  Park Seung Woo

Producer

• 
  Choi Won Seok

Screenwriter

• 
  Kim Soo Eun

Main Role

• 
  Lee Si Young

  Jo Soo Ji

  Main Role
• 
  Kim Young Kwang

  Jang Do Han

  Main Role
• 
  Kim Tae Hoon

  Kim Eun Joong

  Main Role
• 
  Kim Seul Ki

  Seo Bo Mi

  Main Role
• 
  Key

  Gong Kyung Soo

  Main Role

Support Role

• 
  Choi Mu Sung

  Yoon Seung Ro [Chief of Seoul Central District Prosecutor Office]

  Support Role
• 
  Kim Sang Ho

  Oh Kwang Ho [Chief prosecutor]

  Support Role
• 
  Park Joo Hyung

  Park Joon Pyo [Eun Joong's senior prosecutor]

  Support Role
• 
  Kim Sun Young

  Lee Soon Ae [Metropolitan violent crime team leader]

  Support Role
• 
  Jung Suk Yong

  Nam Byeong Jae [Metropolitan crime team]

  Support Role
• 
  Seo Jae Hyung

  Ma Jin Ki [Metropolitan crime team]

  Support Role
• 
  Shin Dong Wook

  Lee Gwan Woo [Do Han's half brother]

  Support Role
• 
  Kim Jung Young

  [Soo Ji's mother]

  Support Role
• 
  Jeon Mi Seon

  Park Yoon Hee [Shi Wan's mother]

  Support Role
• 
  Yoon Da Young

  Kim Kyeong Mi [Reporter]

  Support Role
• 
  Lomon

  Yoon Shi Wan [Seung Ro's son]

  Support Role
• 
  Ham Na Young

  Jo Yu Na [Su Ji's daughter]

  Support Role
• 
  Sa Hee

  Seung Hee [Woo Sung's wife]

  Support Role
• 
  Kim Do Yoon

  Kang Jin Goo

  Support Role
• 
  Ahn Hyun Ho

  Jin Se Won [Soon Ae's daughter]

  Support Role
• 
  Hong Sung Duk

  Lee Sin Hyeok

  Support Role

Guest Role

• 
  Song Sun Mi

  Chae Hye Sun [Opposition politician]

  Guest Role
• 
  Jung Hyun Seok

  [Doctor]

  Guest Role
• 
  Yoo Jun

  Jang Do Han [Young]

  Guest Role
• 
  Joey Albright

  Hoult

  Guest Role
• 
  Ko Woo Rim

  Jang Do Han [Child]

  Guest Role
• 
  Kim Mi Hye

  [Restaurant staff]

  Guest Role
• 
  Park Hyuk Kwon

  eye-witness (Ep.13)

  Guest Role
• 
  Ahn Suk Hwan

  [Lawyer] (Ep.32)

  Guest Role
• 
  Seo Yoon Ah

  [Bo Mi's elder sister]

  Guest Role
• 
  So Hee Jung

  Lee Eun Ja [Kyung Soo's mother]

  Guest Role
• 
  Kim Dong Joo

  [Woo Sung's mother]

  Guest Role
• 
  Bang Joo Hwan

  Choi Yu Chul

  Guest Role
• 
  Kim Byung Chun

  [Bo Mi's father]

  Guest Role
• 
  Ahn Jong Min

  [Detective]

  Guest Role
• 
  Lee Se Rang

  [Nam Byeong Jae's wife]

  Guest Role
• 
  Bae Je Ki

  Choi Myung Hee

  Guest Role
• 
  Woo Sang Jun

  [Priest]

  Guest Role
• 
  Jo Dong In

  Han Dong Won

  Guest Role
• 
  Im Seung Dae

  Seo Joo Wan

  Guest Role
• 
  Im Byung Ki

  [Lawmaker]

  Guest Role
• 
  Jang Hee Soo

  [Bo Mi's mother]

  Guest Role
• 
  Kim Seung Wook

  [Kyung Soo's father]

  Guest Role
• 
  Im Yong Soon

  [Girl's father] (Ep. 11)

  Guest Role

Unknown

• 
  Hong Jin Ki Unknown
• 
  Jung Da Won Unknown
• 
  Hong Geun Taek Unknown
• 
  Park Seong Kyun Unknown
• 
  Hwang Tae Kwang Unknown
• 
  Ri Min Unknown
• 
  Im Jae Geun Unknown
• 
  Im Ho Joon Unknown
• 
  Kim Ki Moo Unknown
• 
  Nam Jung Hee Unknown
• 
  Kim Young Choon Unknown
• 
  Song Young Jae Unknown
• 
  Jeon Jae Hyung Unknown
• 
  Kim Soo Yeon Unknown