Cast & crew
Secret (2009)
Directed by Yoon Jae-goo Written by Yoon Jae-goo
Cast
| Cha Seung-won | Kim Seong-ryeol |
| Ryu Seung-ryong | Je-kal |
| Oh Jung-se | Kyeong-ho |
| Song Yun-ah | Yu Ji-yeon |
| Park Won-sang | Det. Choi |
| Kim In-kwon | Seok-jun |
| Park Hyo-ju | Hye-jin |
| Yang Eun-yong | Eun-young |
| Ye Su-jeong | Ji-yeon's Mother |
| Lee El | Young-sook |
| Choe Yoon-seul | Nurse |
| Um Tae-goo | Man on Phone |
| Im Gi-hong | Detective |
| Yang Geun-seok | Plainclothes Officer |
| Lee Cheol-min | Cho Dong-cheol |
| Choi Seong-min | Doctor |
| Song Ji-in | Poster woman |
| Lee Jae-gu | Goo Cheol-seung |
| Jung In-gi | Kang |
| Kim Dong-joo | Seok-jun's mother |
Crew
| Kim Yu-seon | Costume Design |
| Kwak Joong-hoon | Producer |
| Yoon Jae-goo | Director |
| Ricky Jeon Je-Hyeok | Stunts |
| Baek Sang-hoon | Visual Effects Supervisor |
| Lee Seong-je | Director of Photography |
| Lee Du-hoon | Camera Operator |
| Kim Nam-sik | VFX Supervisor |
| Yi Eun-ju | Production Sound Mixer |
| Lee Byeong-hoon | Lighting Director |
| Park Eun-kyung | Assistant Editor |
| Yoon Jae-goo | Screenplay |
| Lee Hyeon-Myeong | Producer |
| Kil Young-min | Executive Producer |
| JK Youn | Executive Producer |
| Park A-hyoung | Line Producer |
| Ku Tae-jin | Line Producer |
| Yoon Ki-chan | Set Decoration |
| Jang Jin-seung | Co-Producer |