Hyper Knife

Director

• 
  Kim Jung Hyun

Screenwriter

• 
  Kim Seon Hui

Main Role

• 
  Park Eun Bin

  Jung Se Ok

  Main Role
• 
  Sul Kyung Gu

  Choi Deok Hui

  Main Role
• 
  Park Byung Eun

  Han Hyeon Ho

  Main Role
• 
  Yoon Chan Young

  Seo Yeong Ju

  Main Role

Support Role

• 
  Kang Ji Eun

  Mrs. Ra [Deok Hui's assistant]

  Support Role
• 
  Lee Do Yun

  Ha U Yeong [Neurosurgery director]

  Support Role
• 
  Lee Seung Yeon

  Na Hye Su

  Support Role
• 
  Oh Yong

  Song Jin U [Neurosurgery professor]

  Support Role
• 
  Jang Won Hyung

  Lee Wan Il [Sergeant]

  Support Role
• 
  Yoo Seung Mok

  Yang Dong Yeong [Superintendent]

  Support Role
• 
  Han Joon Woo

  Alan Kim [Deok Hui's disciple]

  Support Role
• 
  Moon Jung Woong

  Officer Park

  Support Role
• 
  Kim Hak Seon

  Kim Myeong Jin [Deok Hui's classmate]

  Support Role
• 
  Ryu Hae Jun

  Kim Gi Yeong [Myeong Jin’s son]

  Support Role
• 
  Won Chun Gyu

  Yong Seok [Mental hospital manager]

  Support Role
• 
  Kim Su Yeon

  Kim Yeong Sin [Pharmacist]

  Support Role
• 
  Kim Yeon Chul

  Pyo In Guk [Smuggling broke]

  Support Role
• 
  Kim Hyuk Jong

  Detective Choi

  Support Role
• 
  Oh Hyun Soo

  Team Leader Seong

  Support Role
• 
  Hong Won Pyo

  Detective Kim

  Support Role
• 
  Song Hoon

  [Deok Hui's butler]

  Support Role
• 
  Park Kyung Geun

  [Chief]

  Support Role

Guest Role

• 
  Jang Sun

  Park Mi Ran [Nurse] (Ep. 1)

  Guest Role
• 
  Kim Chan Hyung

  Sang Gi [Gang leader] (Ep. 1)

  Guest Role
• 
  Won Hyun Joon

  Min Hyeon Ju [Broker] (Ep. 1)

  Guest Role
• 
  Kim Jong Man

  Kim Du Bong [Faction leader] (Ep. 1)

  Guest Role
• 
  Im Jun Hyeong

  [Gang member] (Ep. 1)

  Guest Role
• 
  Choi Yoon Bin

  [Gang member] (Ep. 1)

  Guest Role
• 
  Sung Jeong Seon

  [Pharmacy customer] (Ep. 1)

  Guest Role
• 
  Lee Tae Young

  Kwon Sin Gyu [Ma Ri's brother] (Ep. 1-2)

  Guest Role
• 
  Son Kyung Won

  Dr. Kang (Ep. 2)

  Guest Role
• 
  Lee Dong Hee

  Mr. Kang (Ep. 2)

  Guest Role
• 
  Kim Moon Chan

  Mr. Park (Ep. 2)

  Guest Role
• 
  Heo Ji Na

  Kwon Ma Ri [Restaurant owner] (Ep. 2)

  Guest Role
• 
  Song Kyung Hwa

  [U Yeong's mom] (Ep. 2)

  Guest Role
• 
  Kim Sang Wook

  Tsunoda Yuji (Ep. 3)

  Guest Role
• 
  Ryoga Haruhi

  Nanae Ichida [President of Ichida Pharmaceutical] (Ep. 3)

  Guest Role
• 
  Ha Young Jin

  [Doctor] (Ep. 3)

  Guest Role
• 
  Yang Hee Woo

  [Reporter] (Ep. 3)

  Guest Role
• 
  Kim Mi Ji

  [Reporter] (Ep. 3)

  Guest Role
• 
  Kwon Bum Taek

  [Busan mayor] (Ep. 3)

  Guest Role
• 
  Lee Ji Hyun

  Song Eun Chae [Analyst] (Ep. 4, 7)

  Guest Role
• 
  Kim Bong Jo

  Detective Na (Ep. 5)

  Guest Role
• 
  Jang Jae Kwon

  [Doctor] (Ep. 5)

  Guest Role
• 
  Kim Jae Geon

  Kim Eun Tae [Cult leader] (Ep. 6)

  Guest Role
• 
  Kim Joon Bum

  [Clinic manager] (Ep. 7)

  Guest Role
• 
  Daniela

  Sophie

  Guest Role
• 
  Seol Yu Jin

  Jung A

  Guest Role
• 
  Lee Tae Il

  Yong Rye Ol

  Guest Role
• 
  Shin Sung Kyun

  Jang Byeong Ho [Chairman]

  Guest Role
• 
  Yoon Jung Hoon

  Kim Se Guk [Neurosurgery resident]

  Guest Role
• 
  Han Soo Ho

  Park Su Ho

  Guest Role
• 
  Lee Myung Hee

  [Nursing home nurse]

  Guest Role
• 
  Jeon Sang Hyuk

  [Yeonshin University Hospital doctor]

  Guest Role