| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Hong Jong-chan | Crew | Directing | Director | 16 |
 Jinnie Choi | Crew | Production | Executive Producer | 16 |
 Ha Sung-woon | Crew | Sound | Vocals | 16 |
Kim Hye-young | Crew | Writing | Writer | 16 |
Jang Yang-ho | Crew | Directing | Co-Director | 16 |
 Lee Han-wi | Cast | Actor | Man Soo [Uhm So Hye's husband] | 1 |
 Kim Mi-kyeong | Cast | Actress | Ko Young-sook | 16 |
 Lee Il-hwa | Cast | Actress | Kong Eun-young | 16 |
 Park Myung-shin | Cast | Actress | Nam Se-yeon | 16 |
 Kim Yeong-ok | Cast | Actress | Duk Mi's grandmother | 1 |
 Kim Bo-ra | Cast | Actress | Cindy / Kim Hyo-jin | 16 |
 Kim Jae-wook | Cast | Actor | Ryan Gold / Heo Yoon-jae | 16 |
 Jeong Soo-young | Cast | Actress | Fortune teller | 1 |
 Im Ji-gyu | Cast | Actor | Kang Seung-min | 16 |
 Park Jin-joo | Cast | Actress | Lee Sun-joo | 16 |
 Park Min-young | Cast | Actress | Sung Deok-mi | 16 |
 Kim Ho-chang | Cast | Actor | Ryan's psychiatrist | 1 |
 Kim Sun-young | Cast | Actress | Eom So-hye | 16 |
 Ahn Bo-hyun | Cast | Actor | Nam Eun-gi | 16 |
 Hwang Hyo-eun | Cast | Actress | Latte | 2 |
 Park Seul-gi | Cast | Actress | MC of Shi Ahn's fan meeting | 1 |
 Hong Seo-young | Cast | Actress | Choi Da-In | 16 |
 Maeng Sang-hun | Cast | Actor | Sung Geun-ho | 16 |
 Jung Won-chang | Cast | Actor | Kim Yoo-sub | 16 |
 Yeo Moo-yeong | Cast | Actor | [the man Sung Duk Mi was running away from] | 1 |
 Jung Jae-won | Cast | Actor | Cha Shi-an | 16 |
 Ariane Desgagnés-Leclerc | Cast | US Art Exhibit patron | 1 | |
 Seo Ye-hwa | Cast | Actress | Yoo Kyung-a | 16 |
 Lee Chae-kyung | Cast | Actress | Choi Eun-Hye | 1 |
 Kang Jeong-woo | Cast | Actor | NIS Agent | 16 |
 Kim Mi-hye | Cast | Actress | Hotel Employee | 16 |
 Ahn Hyun-bin | Cast | Actor | [Detective questioning fangirl museum assault] | 16 |
 Choi Jae-sup | Cast | Actor | Duk Mi imagining autopsy | 1 |
 Amy Aleha | Cast | Actress | Art Collector | 16 |
 Lee Hyo Bi | Cast | Actress | [child who drew Ryan Gold's face] | 1 |
 Yang Hee-won | Cast | Actor | Young Nam Eun-gi | 16 |
 Noreen Joyce Guerra | Cast | Actress | Cha Shi-an's Fan | 16 |
 Han Hyun Uk | Cast | Actor | Member of White Ocean | 1 |
 Hwang In Ho | Cast | Actor | Member of White Ocean | 1 |
 Lee In Pyo | Cast | Actor | Member of White Ocean | 1 |
 Yoo Ji Ahn | Cast | Actor | Member of White Ocean | 1 |
| Person | Type | Job | Role(s) | Episodes |
