Pemeran Hyper Knife

Park Eun Bin (박은빈)

as Jung Se Ok

Pemeran Utama

Sul Kyung Gu (설경구)

as Choi Deok Hui

Pemeran Utama

Park Byung Eun (박병은)

as Han Hyeon Ho

Pemeran Utama

Yoon Chan Young (윤찬영)

as Seo Yeong Ju

Pemeran Utama

Lee Do Yun

as Ha U Yeong [Neurosurgery director]

Pemeran Pembantu

Lee Seung Yeon

as Na Hye Su

Pemeran Pembantu

Oh Yong

as Song Jin U [Neurosurgery professor]

Pemeran Pembantu

Jang Won Hyung

as Lee Wan Il [Sergeant]

Pemeran Pembantu

Yoo Seung Mok

as Yang Dong Yeong [Superintendent]

Pemeran Pembantu

Moon Jung Woong

as Officer Park

Pemeran Pembantu

Ryu Hae Jun

as Kim Gi Yeong [Myeong Jin’s son]

Pemeran Pembantu

Won Chun Gyu

as Yong Seok [Mental hospital manager]

Pemeran Pembantu

Kim Su Yeon

as Kim Yeong Sin [Pharmacist]

Pemeran Pembantu

Kim Yeon Chul

as Pyo In Guk [Smuggling broke]

Pemeran Pembantu

Kim Hyuk Jong

as Detective Choi

Pemeran Pembantu

Oh Hyun Soo

as Team Leader Seong

Pemeran Pembantu

Hong Won Pyo

as Detective Kim

Pemeran Pembantu

Park Kyung Geun

as [Chief]

Pemeran Pembantu

Kang Ji Eun

as Mrs. Ra [Deok Hui's assistant]

Pemeran Pembantu

Han Joon Woo

as Alan Kim [Deok Hui's disciple]

Pemeran Pembantu

Kim Hak Seon

as Kim Myeong Jin [Deok Hui's classmate]

Pemeran Pembantu

Song Hoon

as [Deok Hui's butler]

Pemeran Pembantu

Jang Sun

as Park Mi Ran [Nurse] (Ep. 1)

Bintang Tamu

Kim Chan Hyung

as Sang Gi [Gang leader] (Ep. 1)

Bintang Tamu

Won Hyun Joon (원현준)

as Min Hyeon Ju [Broker] (Ep. 1)

Bintang Tamu

Kim Jong Man

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

Bintang Tamu

Im Jun Hyeong

as [Gang member] (Ep. 1)

Bintang Tamu

Choi Yoon Bin

as [Gang member] (Ep. 1)

Bintang Tamu

Sung Jeong Seon

as [Pharmacy customer] (Ep. 1)

Bintang Tamu

Son Kyung Won

as Dr. Kang (Ep. 2)

Bintang Tamu

Lee Dong Hee

as Mr. Kang (Ep. 2)

Bintang Tamu

Kim Moon Chan

as Mr. Park (Ep. 2)

Bintang Tamu

Heo Ji Na

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

Bintang Tamu

Kim Sang Wook

as Tsunoda Yuji (Ep. 3)

Bintang Tamu

Ryoga Haruhi

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

Bintang Tamu

Ha Young Jin

as [Doctor] (Ep. 3)

Bintang Tamu

Yang Hee Woo

as [Reporter] (Ep. 3)

Bintang Tamu

Kim Mi Ji

as [Reporter] (Ep. 3)

Bintang Tamu

Kwon Bum Taek

as [Busan mayor] (Ep. 3)

Bintang Tamu

Lee Ji Hyun

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

Bintang Tamu

Kim Bong Jo

as Detective Na (Ep. 5)

Bintang Tamu

Jang Jae Kwon

as [Doctor] (Ep. 5)

Bintang Tamu

Kim Jae Geon

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

Bintang Tamu

Kim Joon Bum

as [Clinic manager] (Ep. 7)

Bintang Tamu

Daniela

as Sophie

Bintang Tamu

Seol Yu Jin

as Jung A

Bintang Tamu

Lee Tae Il

as Yong Rye Ol

Bintang Tamu

Shin Sung Kyun

as Jang Byeong Ho [Chairman]

Bintang Tamu

Yoon Jung Hoon

as Kim Se Guk [Neurosurgery resident]

Bintang Tamu

Han Soo Ho

as Park Su Ho

Bintang Tamu

Lee Myung Hee

as [Nursing home nurse]

Bintang Tamu

Jeon Sang Hyuk

as [Yeonshin University Hospital doctor]

Bintang Tamu

Lee Tae Young

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

Bintang Tamu

Song Kyung Hwa

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

Bintang Tamu

Kim Jung Hyun

Sutradara

Kim Seon Hui

Screenwriter