4th Period Mystery (4교시 추리영역) 15 years old
4th Period Murder Mystery
During fourth period, high schooler Da-jeong finds her classmate Tae-gyu dead in a classroom and Jeong-hun standing in front of him with blood on his clothes. In order to stop Jeong-hun from becoming the prime suspect, Da-jeong must help him find the real murderer, who is still inside the school building, under 40 minutes before period four ends.
Credits
4th Period Mystery Cast
| Name | Character |
|---|---|
| Park Chul-min He was 42, now 57 years old | as Crazy |
| Yoo Seung-ho He was 15, now 31 years old | as Han Jung-hoon |
| Im Soo-hyang She was 19, now 34 years old | |
| Kim Dong-beom He was 18, now 33 years old | as Do-il |
| Rie Young-zin She was 28, now 43 years old | as Yun Sang-mi |
| Jung Young-ki He was 27, now 43 years old | |
| Jeong Seok-yong He was 37, now 52 years old | as Kang Gook-man |
| Sang-geun Jo | as Kim Tae-gyoo |
| Jeon Jun-hong He was 32, now 47 years old | as Embassy |
| Jo Yun-hei | as Hong Ju-hee |
| Kang So-ra She was 19, now 34 years old | as Lee Da-jeong |
| Lee Chan-ho He was 20, now 35 years old |
4th Period Mystery Crew
| Name | Department |
|---|---|
| Shin Jai-ho as Writer. He was 32 (now 47) years old | Writing |
| Sang-yong Lee as Director. | Directing |
4th Period Mystery (15 years)
4th Period Murder Mystery
- Release day: Wednesday, August 12, 2009
- Runtime: 86 minutes