I, The Executioner

Hwang Jung-min

as

Seo Do-cheol

Jung Hae-in

as

Park Sun-woo

Oh Dal-su

as

Oh Jae-pyeong

Oh Dae-hwan

as

Wang Dong-hyun

Jang Yoon-ju

as

Bong Yoon-ju

Kim Si-hoo

as

Yoon Shi-young

Jin Kyung

as

Joo-yeon

Shin Seung-hwan

as

Reporter Park

Jeong Man-sik

as

Manager Jeon

Kwon Hae-hyo

as

Senior Superin...

Byun Hong-jun

as

Seo Woo-jin

Ahn Bo-hyun

as

Min Kang-hoon

Heo Joon-ho

as

Kang Hang-jo

Hyun Bong-sik

as

Ddeokchil

Kim Jae-hwa

as

Madam

Park Jun-myun

as

Gambling Group

Park Kyung-hye

as

Gambling Group

Joo Bo-bi

as

Gambling Group

Kim Won-hae

as

Former Team Le...

Park Myung-shin

as

School Princip...

Ahn Sang-tae

as

Dean of Studen...

Woo Jeong-won

as

Chi-hoon's Mot...

Jo Kwan-woo

as

Chi-hoon's Fat...

Kim Min-su

Seo Young-joo

Heo Nam-jun

Nam Jin-bok