Pemeran Watcher

Han Seok Kyu

as Do Chi Gwang

Pemeran Utama

Seo Kang Jun (서강준)

as Kim Yeong Gun

Pemeran Utama

Kim Hyun Joo

as Han Tae Ju

Pemeran Utama

Park Joo Hee

as Cho Su Yeon

Pemeran Pembantu

Heo Sung Tae

as Jang Hae Ryong [Special crime squad leader]

Pemeran Pembantu

Joo Jin Mo

as Park Jin U [Deputy commissioner]

Pemeran Pembantu

Kim Soo Jin

as Yeom Dong Suk [Commissioner]

Pemeran Pembantu

Woo Jeong Won

as Park Ji Hyeon [Psychiatrist]

Pemeran Pembantu

Park Ji Hoon

as Park Si Yeong

Pemeran Pembantu

Jung Soon Won

as Jung Han Uk

Pemeran Pembantu

Kim Dae Geon

as Chan Hui [Detective]

Pemeran Pembantu

Park Sung Il

as Department Head Kim

Pemeran Pembantu

Jeon Seok Chan

as Kim Jo Han

Pemeran Pembantu

Kim Dong Hyun

as Kim Sang Jun

Pemeran Pembantu

Yoo Jung Ho

as Park Jeong Geun

Pemeran Pembantu

Shin Hyun Jong

as Min Yeong Gi [District prosecutor]

Pemeran Pembantu

Lee Eol

as Jang Hyeon Gu

Pemeran Pembantu

Han Sang Hoon

as [Coroner]

Pemeran Pembantu

Yu Seung Il

as [Driving violator] (Ep. 1)

Bintang Tamu

Park Yong

as (Ep. 1)

Bintang Tamu

Jeong Min Sung

as Son Byeong Gil [Kidnapper] (Ep. 1-2)

Bintang Tamu

Kim Geon U

as Kim Cha Hun (Ep. 1-2)

Bintang Tamu

Kim Dong Hyun

as Kim Sang Jun (Ep. 1-2)

Bintang Tamu

Lee Jae Yoon

as Kim Gang Uk [Detective] (Ep. 1-2, 12-13)

Bintang Tamu

Chae Dong Hyun

as Lee Dong Yun [Prosecutor] (Ep. 3-4)

Bintang Tamu

Kim Yong Ji

as Lee Hyo Jeong (Ep. 3-4)

Bintang Tamu

Shin Moon Sung

as (Ep. 10)

Bintang Tamu

Yi Seo

as Jang Ji Yun (Ep. 14)

Bintang Tamu

Moon Woo Jin

as Kim Yeong Gun [Young]

Bintang Tamu

Lee Seung Chul

as Jung Seok Tae [Chairman]

Bintang Tamu

Yoo Ha Joon

as O Sang Do

Bintang Tamu

Lee Nam Hee

as Sin O Seong [CEO of O Seong Capital]

Bintang Tamu

Kim Joo Yeon

as Baek Song I

Bintang Tamu

Yong Jin

as [Prisoner]

Bintang Tamu

Jang Eui Don

as [Patient]

Bintang Tamu

Seo Myung Chan

as [Corpse gangster]

Bintang Tamu

Yu Yeon Seok

as [Detective]

Bintang Tamu

Kim Seung Hyun

as [Trafficker]

Bintang Tamu

Lee Dong Gyu (이동규)

as [Reporter]

Bintang Tamu

Han Seung Soo

as [Regional investigation unit detective]

Bintang Tamu

Won Gun Su

as [Detective 2]

Bintang Tamu

Kim Tae Seong

Composer

Ahn Gil Ho

Sutradara

Steve M. Choe

Editor

Han Sang Un

Screenwriter