Pemeran W

Lee Jong Suk (이종석)

as Kang Chul

Pemeran Utama

Han Hyo Joo

as O Yeon Ju

Pemeran Utama

Park Sung Taek

as Detective Park

Pemeran Pembantu

Lee Chae Kyung

as Nurse Jung

Pemeran Pembantu

Kim Ji Eun (김지은)

as [Girl at bus stop] (Ep. 3)

Bintang Tamu

Hwang Seok Jeong

as [Webtoon writer] (Ep. 6)

Bintang Tamu

Oh Hee Joon

as [Motel receptionist] (Ep. 16)

Bintang Tamu

Ri Min

as Team Leader Park

Bintang Tamu

Jung Ji So

as O Yeon Ju [Young]

Bintang Tamu

Park Min Ha

as O Yeon Ju [Young]

Bintang Tamu

Kang Pil Sun

as [Doctor]

Bintang Tamu

Kim Mi Hye

as [Reporter]

Bintang Tamu

Jin Hyun Kwang

as [Police officer]

Bintang Tamu

Kim Ik Tae

as [Lawmaker]

Bintang Tamu

Kim Deuk Gyum

as [Hotel waiter]

Bintang Tamu

Song Jae Ryong

as [Game speaker]

Bintang Tamu

Park Se Hoon

as [Psychiatric hospital nurse]

Bintang Tamu

Park Sook Myung

as [Market clothing store owner]

Bintang Tamu

Park Won Ho

Bintang Tamu

Sul Ji Yoon

Bintang Tamu

Copykumo

Composer

Jung Se Rin

Composer

Jeong Dae Yun

Sutradara

Park Seung Woo

Sutradara

Baek Kyung Chan

Martial Arts Director

Song Jae Jung

Screenwriter