- Country: South Korea
- Genres: Action, Crime, Drama
- Release: 2017-05-18
- Director: Sung-hyun Byun
- Writers: Min-soo Kim , Myeong-chan Park , Sung-hyun Byun
- Language: Korean | Russian
- Stars: Kyung-gu Sol , Si-wan Im , Lee Kyung-young , Hye-jin Jeon , Jason Nelson , Byung Mo Choi , Tim Rixx , Dong-yong Lee , Andreas Fronk , Geun-Su Won
- Runtime: 117 min
- Awards: 12 wins & 23 nominations
- AKA: The Merciless (Thailand) , Безжалостный (Russian Federation) , The Merciless (United Kingdom) , The Merciless , Nemilosul (Romania) , The Merciless (Australia) , Acımasız (Turkey) , Bulhandang , O Impiedoso (Brazil) , Bulhandang (Korea) , Безмилостният (Bulgaria) , The Merciless (India) , Bezlitosny (Poland) , The Merciless (Egypt) , 不汗黨:地下秩序 (Taiwan) , The Merciless (Canada) , 名もなき野良犬の輪舞(ロンド) (Japan) , Cuộc Chiến Ngầm (Vietnam) , A könyörtelen (Hungary) , Bulhandang Nabbeun Nomdeului Sesang (Korea) , The Merciless (Philippines) , The Merciless (United States of America) , Bez milosti (Serbia) , Sans pitié (France, French Republic)불한당
- Plot:
Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.
- IMDB:tt6777370
The Merciless Cast · · · ALL
Sung-hyun Byun
Director
Kyung-gu Sol
Han Jae-ho
Yim Si-wan
Jo Hyun-su
Kim Hee-won
Byung-gab
Hye-jin Jeon
In-sook
Lee Kyung-young
Byung-chul
Ji-yoon Moon
Young-geun
Jang In-sub
Min-chul
Seong-oh Kim
Seung-pil
Seon-kyu Jin
Prison Chief Security Officer
Heo Joon-ho
Kim Sung-han
So-yul Shin
Osean Trading Advertisement Beauty 1
Bo-mi Kim
Osean Trading Advertisement Beauty 2
Andreas Fronk
Russian Mafia
Su-Young Park
Priest Jang
Ji-hun Lee
Public Prosecutor Oh
Hong In
Bang-gae
Jason Scott Nelson
Vlad
Carson Allen
Russian Woman