| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 JQ Lee | Crew | Production | Executive Producer | 7 |
 Park Shin-woo | Crew | Directing | Director | 7 |
 Nam Sang Wook | Crew | Writing | Writer | 7 |
 Choi Hong-il | Cast | Actor | Profiler Suk [Seo Yeong's superior] | 7 |
 Lee Seo-jin | Cast | Actor | Kang Woo-hyun | 7 |
 Jo Dal-hwan | Cast | Actor | Bae Nam-Soo | 7 |
 Sung Dong-il | Cast | Actor | Ko Dong-kook | 7 |
 Byun Hee-bong | Cast | Actor | Kim Shin-woo | 7 |
 Nam Jung-hee | Cast | Actress | [Grandma with dementia] | 1 |
 Seo Young-hee | Cast | Actress | Shin Yeon-soo | 7 |
 Yoon Kyung-ho | Cast | Actor | Mr. Yoon [Coffee owner] | 7 |
 Oh Chang-kyung | Cast | Actor | Yang Duk Chul [Detective] | 7 |
 Im Hwa-young | Cast | Actress | Yoon Seo-young | 7 |
 Jang Seong-beom | Cast | Actor | Park Sung-Bum | 7 |
 Kim Kwang-kyu | Cast | Actor | Jang Man-ho | 7 |
 Dong Hyun-bae | Cast | Actor | Reporter Seo | 7 |
 Kwak Min-ho | Cast | Actor | Detective Gwang Su Dae | 7 |
 Lee Na-ra | Cast | Actress | Park Sun Mi [Min Joo's mother] | 7 |
 Park Jin-young | Cast | Actor | Gambler | 1 |
 Lee Jun-hee | Cast | Actor | [Director] | 1 |
 Choi Myeong-been | Cast | Actress | Go Min Joo [Dong Gook's daughter] | 7 |
 Jang Won-hyung | Cast | Actor | Ho-gae | 7 |
 Carson Allen | Cast | Actress | Gambling Room Coffee Girl | 1 |
 Lee Si-hoon | Cast | Actor | Young Master | 7 |
 Lee Ju-bin | Cast | Actress | Kim Shi Hyun [Woo Hyun's secretary] | 7 |
 Baek Ji-won | Cast | Actress | Mrs. Jo | 7 |
 Oh Ryoong | Cast | Actor | Hong Won Tae [Representative] | 7 |
 Oh Han-kyul | Cast | Actor | Gang Shi Woo [Woo Hyun's son] | 7 |
 Kwon Hyeok-beom | Cast | Actor | [Mrs. Jo's subordinate] | 7 |
 Choi Jae-sup | Cast | Actor | Reporter Go | 7 |
| Person | Type | Job | Role(s) | Episodes |
