Chief of Staff

Composer

• 
  Choi Chul Ho

Director

• 
  Kwak Jung Hwan

Screenwriter

• 
  Lee Dae II

Main Role

• 
  Lee Jung Jae

  Jang Tae Jun

  Main Role
• 
  Shin Min Ah

  Kang Sun Yeong

  Main Role
• 
  Kim Gab Soo

  Song Hee Seop

  Main Role
• 
  Lee Elijah

  Yoon Hye Won

  Main Role
• 
  Kim Dong Jun

  Han Do Kyung

  Main Role
• 
  Jung Jin Young

  Lee Sung Min

  Main Role
• 
  Jung Woong In

  Oh Won Shik

  Main Role
• 
  Im Won Hee

  Ko Seok Man

  Main Role

Support Role

• 
  Kim Hong Pa

  Jo Gap Young [Chairman of Labor Committee]

  Support Role
• 
  Lee Chul Min

  Kim Hyung Do [Senior advisor to Gap Young office]

  Support Role
• 
  Jeon Jin Ki

  Lee Gwi Dong [Song Hee Seop office 5th grade performance]

  Support Role
• 
  Jeon Seung Bin

  Kim Jong Wook [Song Hee Seop office 5th grade performance]

  Support Role
• 
  Yoo Sung Joo

  Lee Chang Jin [CEO of Jujin Chemistry / manager of Samilhe]

  Support Role
• 
  Park Myung Shin

  Yeo Sook Hee [Han Do Kyung's mother]

  Support Role
• 
  Kim Seo Ha

  Lee In Soo [Senior advisor of Lee Sung Min office]

  Support Role
• 
  Kim Ik Tae

  Lee Sang Guk [Head of judiciary committee inspection]

  Support Role
• 
  Do Eun Bi

  Noh Da Jeong [Song Hee Seop office 9th grade performance secretary]

  Support Role
• 
  Choi Ga In

  [Lee Sung Min’s wife]

  Support Role
• 
  Ji So Yeon

  Kim Mi Jin [Announcer]

  Support Role
• 
  Yoo Ha Bok

  Park Jong Gil [Assemblyman]

  Support Role
• 
  Park Geon

  Seo Hyeong Cheol [Prosecutor]

  Support Role
• 
  Nam Jin Bok

  Jeong Han Su [Head of Intelligence Unit 1]

  Support Role
• 
  Noh Seung Jin

  Assemblyman Ahn

  Support Role
• 
  Ma Si Hwan

  Prosecutor Yoon

  Support Role
• 
  Won Chun Gyu

  Lee Deok Hui

  Support Role
• 
  Lee Shin Ki

  Lee Shin Ki

  Support Role
• 
  Yoon Kap Soo

  Jo Nam Gi

  Support Role
• 
  Park Gun

  Seo Hyeong Cheol

  Support Role

Guest Role

• 
  Lee Soon Won

  Detective Lee Hyeong Bae (Ep. 1, 3, 8-9)

  Guest Role
• 
  Kim Eung Soo

  Jang Choon Bae [Tae Joon's father] (Ep. 1, 7)

  Guest Role
• 
  Jang Jae Ho

  Sung Woo [Reporter of Dodam Daily] (Ep. 2)

  Guest Role
• 
  Lee Joon Hee

  [Member of Jo Gap Young's party] (Ep. 2)

  Guest Role
• 
  Cha Soon Bae

  [Minister of Justice's Chief of Staff] (Ep. 2-4)

  Guest Role
• 
  Son So Mang

  Lee Jin Ah (Ep. 4)

  Guest Role
• 
  Kim Mi Hye

  [News Anchor] (Ep. 4)

  Guest Role
• 
  Lee Han Wi

  [Chief presidential secretary] (Ep. 4-5, 7)

  Guest Role
• 
  Lee Yong Yi

  Ok Ja [Jujin Factory's victim's Grandmother] (Ep. 5-6, 10)

  Guest Role
• 
  Go In Beom

  Sung Young Gi [Chairman of the Samilhe] (Ep. 8)

  Guest Role
• 
  Seo Wang Seok

  [Detective] (Ep. 9)

  Guest Role
• 
  Lee Jong Goo

  [Barber]

  Guest Role
• 
  Lee Min Ji

  [Aide for Kang Sun Young]

  Guest Role
• 
  Sung I Eon

  [Reporter]

  Guest Role
• 
  Park Yoon Young

  [Sung Min's daughter]

  Guest Role
• 
  Park Jae Wan

  [TV News Director]

  Guest Role
• 
  Park So Yoon

  [Citizen]

  Guest Role
• 
  Moon Hyun Jung

  [Dong Ho’s wife]

  Guest Role
• 
  Baek Seung Hwan

  [Congressman]

  Guest Role
• 
  Lee Si Young

  [Employee]

  Guest Role
• 
  Jang Eui Don

  [Local residents committee]

  Guest Role
• 
  Moon Seung Bae

  Kim In Gyu [Head of Finance team, Bugang Electronics]

  Guest Role
• 
  Kim Joo Ah

  Jung Eun Hee [Lawmaker]

  Guest Role
• 
  Kim Jin Ok

  [Protestor] (Ep. 10)

  Guest Role

Unknown

• 
  Ji Tae Yang Unknown
• 
  Lee Hyun Jung Unknown
• 
  Lee Ji Hyuk Unknown
• 
  Kim In Mok Unknown