The Merciless

Sul Kyung-gu

Han Jae-ho

Yim Si-wan

Jo Hyun-su

Kim Hie-won

Byung-gab

Jeon Hye-jin

In-sook

Lee Kyung-young

Byung-chul

Moon Ji-yoon

Young-geun

Jang In-sub

Min-chul

Kim Ji-hoon

Jung-sik

Kim Seung-oh

Seung-pil

Jin Sun-kyu

Prison Chief Security Officer

Huh Joon-ho

Kim Sung-han

Shin So-yul

Osean Trading Advertisement Beauty 1

Kim Bo-mi

Osean Trading Advertisement Beauty 2

Lee Ru-ahn

Osean Trading Advertisement Beauty 3

Choi Byung-mo

Captain Choi

Andreas Fronk

Russian Mafia

Lee Si-hoon

Jae-ho's Subordinate

Choi Jun-young

Yong-chan

Yoon Yeong-gyun

Jae-ho's Subordinate

Lee Kyu-ho

Odd Pair Inmate

Jeon Gwon-ha

Captain Choi's Gang

Kim Ki-ho

Jung-sik's Subordinate

Park Soo-young

Priest Jang

Nam Kee-ae

Hyun-soo's Mother