Pemeran Officer Black Belt

Kim Woo Bin (김우빈)

as Lee Jeong Do

Pemeran Utama

Kim Sung Kyun (김성균)

as Kim Sun Min

Pemeran Utama

Kim Yool Ho

as Choi Gyeong Sa [Chief]

Pemeran Pembantu

Lee Hae Young

as Lee Sang U [Jeong Do's father]

Pemeran Pembantu

Son Sang Yeon (손상연)

as Lee Yang Ho [Probationer]

Pemeran Pembantu

Lee Joong Ok

as Han Byeong Sun [Offender]

Pemeran Pembantu

Kim Ji Young

as Ha Sun Jeong [Salon owner]

Pemeran Pembantu

Park Ji Yeol

as Jo Min Jo [Electronic supervision division chief]

Pemeran Pembantu

Kang Hyung Suk

as Kang Ju Seok / "Writer Kang" [Jeong Do's friend]

Pemeran Pembantu

Cha Wang Hyeon

as Kim Cha Hyeon / "Earthworm" [Jeong Do's friend]

Pemeran Pembantu

Kim Yo Han

as "Moisture" [Jeong Do's friend]

Pemeran Pembantu

Lee Hyun Kul

as Kang Gi Jeong [Offender]

Pemeran Pembantu

Kang Seung Ho

as Kim Min Uk [Offender]

Pemeran Pembantu

Yoon Dae Yeol

as Yun Se Il

Pemeran Pembantu

Jin Mi Sa

as Manager Park

Pemeran Pembantu

Lee Jeong Gwi

as Han Dong Hun [Electronic supervision division chief]

Pemeran Pembantu

Bang Byung Hyun

as Park Yeong Bin

Pemeran Pembantu

Ahn Chae Heum

as Lee Min Ju

Bintang Tamu

Choi Hwan Yi

as An Jung Ho

Bintang Tamu

Jung Ji Ho

as Professor Kim

Bintang Tamu

Park Jong Hui

as Kim Geum Nam [Probationer]

Bintang Tamu

Nam Ji Woo

as Lee Jong In [Probationer]

Bintang Tamu

Woo Sang Ki

as Min Do Ung [Probationer]

Bintang Tamu

Shin Mi Young

as Hyun Yu Jin [Mi Ju's grandmother]

Bintang Tamu

Son Suk Bae

as [Manager]

Bintang Tamu

Kim Ji Ahn

as [Writer Kang's mother]

Bintang Tamu

Lee Jung Hyun

as [Self-defense shop clerk]

Bintang Tamu

Kim Hoe Chang

as [Taekwondo athlete]

Bintang Tamu

Kwon Il Yong

Bintang Tamu

Lee Myung Hee

as [Min Jo's mom]

Bintang Tamu

Kang Bo Min

as [Min Ju's mother]

Bintang Tamu

Koo Ja Wan

Composer

Jung Sung Ho

Martial Arts Director

Jason Kim

Screenwriter & Sutradara

Ji Jin Hee (지진희)

as [President]

Cameo

Jeon Gang Ho

as [MZ gang member]

Bit part