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하정우 as Goo Joo-wol / Detective Ma Dong-wook |
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공효진 as Lee Hee-jin / Kim Hae-young |
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유인나 as Soo-jung / Kyung-sook |
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조희봉 as Publisher Kwak / Detective Squad Chief Kwak |
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이병준 as M |
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지진희 as Goo Joo-ro |
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곽도원 as Director Hwang |
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서현우 as Yi-gyu |
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손병욱 as Juwol's Homeroom Teacher |
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전수지 as Art Teacher |
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Choi Won-tae as Baek Sun-il |
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김재화 as Joo-hee |
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Park Jun-myun as Baek Sun-young |
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Lee Jun-hyeok as Professor Jeong |
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유태오 as Secretary |
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김지훈 as Detective |
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박영수 as Young-shik / President Jo |
| Art | Lee Jong-il | Set Decoration |
| Sound | Kim Dong-gi | Original Music Composer |
| Production | 신영일 | Producer |
| Costume & Make-Up | Shin Ji-young | Costume Design |
| Production | Bae Jeong-min | Producer |
| Writing | 전계수 | Screenplay |
| Directing | 전계수 | Director |
| Sound | Lee Soon-sung | Production Sound Mixer |
| Camera | Kim Young-min | Director of Photography |
| Costume & Make-Up | 김현정 | Makeup & Hair |
| Editing | 김형주 | Editor |
| Production | 이준규 | Production Supervisor |
| Art | Kim Cho-hea | Art Direction |
| Lighting | Chu In-sik | Lighting Director |
| Writing | Kang Sook | Storyboard |
| Production | 나병준 | Executive Producer |
| Costume & Make-Up | 홍은화 | Costume Supervisor |
