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4th Period Mystery, released internationally as The Clue, is a 2009 South Korean thriller film starring Yoo Seung-ho and Kang So-ra.
Original Release
08/12/2009
Cast
| Name | Character |
|---|
| Chi-yong Ahn | School Inspector |
| Ryoo Byeong-Gil | Tae-Gyoo's Line 1 |
| Im Chan-Woo | Security Guard |
| In-sook Choi | School Inspector's Secretary |
| Kim Dae-Jeong | Karaoke Female Student 3 |
| Park Dan-Bi | Student In Grade 2 Class 5 |
| Kim Dong-Beom | Do-il |
| Oh Dong-Joon | Student In Grade 2 Class 5 |
| Lee Jung Eun | Female Student #1 |
| Lee Eun-Yeong | Dodgeball Girl |
Directors
Sang-Yong Lee, Lee Sang-yong, Lee Sang-Yong-I
Writers
Dong-Yeop Sin, Lee Sang-Yong-I, Shin Jae Ho, Shin Jai-Ho
Cast
| Name | Character |
|---|
| Chi-yong Ahn | School Inspector |
| Ryoo Byeong-Gil | Tae-Gyoo's Line 1 |
| Im Chan-Woo | Security Guard |
| In-sook Choi | School Inspector's Secretary |
| Kim Dae-Jeong | Karaoke Female Student 3 |
| Park Dan-Bi | Student In Grade 2 Class 5 |
| Kim Dong-Beom | Do-il |
| Oh Dong-Joon | Student In Grade 2 Class 5 |
| Lee Jung Eun | Female Student #1 |
| Lee Eun-Yeong | Dodgeball Girl |
| Go Gil-Joo | Student In Grade 2 Class 5 |
| Jung Yoo Ha | Karaoke Female Student 1 |
| Jae-sang Han | Korean Teacher |
| Jang Hee-Jeong | Student In Grade 2 Class 5 |
| Kim Ho-Yeon | Teacher Next Door |
| Myeong Hong-Jin | Student In Grade 2 Class 5 |
| Choi Hong-Rak | Student In Grade 2 Class 5 |
| Lee Hye-Ah | Female Student |
| Do Hyeon-Soo | Student In Grade 2 Class 5 |
| Kim Hyeong-Geun | Student In Grade 2 Class 5 |
Producers
| Name | Role |
|---|
| Ku Jung-Hee | Producer |
| Seo Myung-Jin | Producer |
