Yim Si-wan

as Lee Han-wool / Mantis

Park Gyu-young

as Shin Jae-yi

Choi Hyun-wook

as Benjamin Jo

Bae Gang-hee

as Yang Soo-min

Hwang Sung-bin

as Puma Lee

Yoo Su-bin

as Kim Dong-yeong

Jeon Bae-soo

as Nam Bae-soo

Jo Woo-jin

as Dok-go

Sul Kyung-gu

as Cha Min-gyu

Jeon Do-yeon

as Gil Bok-soon

Yang Dong-geun

as Gwang-cheon / Bi-cheon

Kim Joon-bae

as Mr. Bae

Park Kang-seop

as Manager Yoo

Do Yu

as Secretary

Ahn Seong-bong

as M.K Information Desk Staff

Seo Ji-oh

as Leaflet

Esom

as Cha Min-hee (archive footage)

Koo Kyo-hwan

as Han Hee-sung (archive footage)

Kim Seung-o

as Shin (archive footage)

Lee Yeon

as Kim Young-ji (archive footage)

Choi Byung-mo

as Hyun-chul (archive footage)

Kim Ki-cheon

as Su-guen (archive footage)

Park Kwang-jae

as Gwang-man (archive footage)

Jang In-sub

as Yoon-sub (archive footage)

Hwangbo Jung-il

as Bar owner

Park Seok-won

as Tatto man

Hwang Jin-woon

as Young Han-wool

Park Gyu-bin

as Young Jae-yi

Kim Chil-doo

as Old man

Sung Il

as Protester

Ha Seon-jae

as Bar friend

Ryu Seong-cheol

as Ssang-bong

Oh Chi-woon

as Cleaner

Aerok Kim

as Tatto Killer

Jang In-seo

as JB Enter. Killer

Han Sang-kyung

as Airport Killer