The veteran detective Seo Do-cheol and his team at Major Crimes, relentless in their pursuit of criminals, join forces with rookie cop Park Sun-woo to track down a serial killer who has plunged the nation into turmoil.
Unfortunately the movie I, The Executioner is not yet available on HBO Max.
| Directing | Ryoo Seung-wan | Director |
| Writing | Ryoo Seung-wan | Writer |
| Sound | Chang Ki-ha | Music |
| Production | Miky Lee | Executive Producer |
| Production | Yoon Sang-hyun | Co-Executive Producer |
| Production | Jerry Kyoungboum Ko | Finance |
| Production | Lee Son-young | Finance |
| Production | Kang Hye-jung | Producer |
| Production | Ryoo Seung-wan | Producer |
| Production | Cho Sung-min | Producer |
| Production | Lee Jun-kyu | Co-Producer |
| Writing | Lee Won-jae | Writer |
| Camera | Choi Young-hwan | Director of Photography |
| Lighting | Lee Jae-hyuk | Gaffer |
| Art | Han Ah-rum | Production Design |
| Editing | Bae Youn-tae | Editor |
| Crew | Yoo Sang-seob | Stunt Coordinator |
| Crew | Jang Han-seung | Stunt Coordinator |
| Costume & Make-Up | Kim Kyeong-mi | Costume Designer |
| Costume & Make-Up | Jang Mi-suk | Costume Designer |
| Costume & Make-Up | Moon Sun-young | Makeup & Hair |
| Costume & Make-Up | Hwang Hyo-kyun | Special Effects Makeup Artist |
| Costume & Make-Up | Kwak Tae-yong | Special Effects Makeup Artist |
| Visual Effects | Jung Do-ahn | Special Effects Supervisor |
| Visual Effects | Lee Hee-kyoung | Special Effects Supervisor |
| Sound | Jung Gun | Production Sound Mixer |
| Sound | Kim Chang-sub | Sound Supervisor |
| Visual Effects | Kim Han-joon | VFX Supervisor |
| Visual Effects | Son Seung-hyun | VFX Supervisor |
| Editing | Park Jin-young | Digital Intermediate |
