Pemeran Doubt

Han Seok Kyu

as Jang Tae Su

Pemeran Utama

Chae Won Bin (채원빈)

as Jang Ha Bin

Pemeran Utama

Han Ye Ri

as Lee Eo Jin

Pemeran Pembantu

Roh Jae Won

as Koo Dae Hong [Inspector]

Pemeran Pembantu

Yoon Kyung Ho (윤경호)

as O Jeong Hwan [Head of homicide squad]

Pemeran Pembantu

Oh Yeon Soo

as Yun Ji Su

Pemeran Pembantu

Lee Shin Ki

as Kim Yong Su [Police officer]

Pemeran Pembantu

Lee Kyo Yeob

as Jo Gyeong Bin [Detective]

Pemeran Pembantu

Na Do Yool

as Park Jae Hun [Police violent crimes team 1]

Pemeran Pembantu

Lee Yang Hee

as Hwang Yeong Su [Forensics investigation team]

Pemeran Pembantu

Park Kyung Geun

as Lee Seok Mun

Pemeran Pembantu

Kim Jung Jin

as Choi Yeong Min

Pemeran Pembantu

Han Soo A

as Song Min A

Pemeran Pembantu

Yoo Ui Tae

as Park Jeon Tae [High school teacher]

Pemeran Pembantu

Choi Yu Hwa (최유화)

as Kim Seong Hui

Pemeran Pembantu

Jo Sung Ha

as Kwon Do Yun [Kim Seong Hui's son]

Pemeran Pembantu

Yoo Oh Sung

as Jeong Du Cheol [Park Jeon Tae's father]

Pemeran Pembantu

Son Sook

as [Ha Bin’s grandmother] (Ep. 2)

Bintang Tamu

Park Eun Woo

as Park Ji Yeon

Bintang Tamu

Song Ji Hyun

as Lee Su Hyeon

Bintang Tamu

Lee Ha Min

as Lee Su Hyeon [Male student]

Bintang Tamu

Lee Ye Ju

as Jang Ha Bin [Child]

Bintang Tamu

Moon Byung Joo

as [Police officer]

Bintang Tamu

Lee Su Ho

as Jang Ha Jun

Bintang Tamu

Song Yeon Hwa

Sutradara