A by-the-book police officer is assigned to secretly investigate a team leader who believes that the rules shouldn't stop an investigation. As the officer investigates further, his own attitudes begin to mirror the team leader's.
You can now watch The Policeman's Lineage online on the following streaming providers in the United States.
| Directing | Lee Kyu-man | Director |
| Writing | Joh Sasaki | Novel |
| Camera | Kang Gook-hyun | Director of Photography |
| Art | Chae Kyung-sun | Production Design |
| Sound | Jang Young-gyu | Original Music Composer |
| Writing | Bae Young-ik | Writer |
| Lighting | Kim Hyo-seong | Lighting Director |
| Editing | Nam Na-young | Editor |
| Art | Jin Hoon | Props |
| Costume & Make-Up | Kim Kyeong-mi | Costume Design |
| Costume & Make-Up | Lee Eun-ju | Makeup & Hair |
| Sound | Lee Seung-yeop | Sound Supervisor |
| Crew | Choi Bong-rock | Martial Arts Choreographer |
| Production | Lee Han-seung | Producer |
| Production | Jung Hyun-ju | Executive Producer |
| Sound | Han Cheol-hui | Production Sound Mixer |
| Production | Kim Min-kyung | Producer |
| Art | Kim Nam-ho | Set Decoration |
| Costume & Make-Up | Kwak Tae-yong | Special Effects Makeup Artist |
| Visual Effects | Yoon Dae-won | Special Effects Supervisor |
| Crew | Ryu Seong-cheol | Stunts |
| Costume & Make-Up | Lee Hee-eun | Special Effects Makeup Artist |
| Crew | Kwon Gwi-deok | Stunts |
| Writing | Son Tae-woong | Adaptation |
| Directing | Lee Tai-sung | Assistant Director |
| Visual Effects | Kim Gwang-wook | VFX Supervisor |
| Crew | Lee Sang-min | Stunts |
| Sound | Park Jun-o | Foley Artist |
| Costume & Make-Up | Kim Ho-sik | Special Effects Makeup Artist |
