

MovieCrimeMysteryThriller
4th Period Mystery
5.8(23)20091h 26m
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.
- Director
- Lee Sang-yong
- Created by
- Ku Jeong-hoe
- Writers
- Shin Jai-ho
Links
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Cast

Yoo Seung-ho
Han Jung-hoon

Kang So-ra
Lee Da-jeong
Jo Sang-geun
Kim Tae-gyoo
Jeon Jun-hong
Byeong-soo

Jeong Seok-yong
Kang Gook-man

Park Cheol-min
Crazy

Rie Young-zin
Yun Sang-mi
Kim Dong-beom
Do-il

Jo Yoon-hee
Hong Ju-hee
Lee Chan-ho
Tak Teuin

Min Kyung-jin
Headmaster

Im Soo-hyang
Fan

Kim Young-woong
History teacher

Jung Young-ki
Student in Grade 2 Class 5

Oh Jin-ha
Student in Grade 2 Class 5

Choi Hong-rak
Student in Grade 2 Class 5

Kim Min-su
Virtual Criminal
Crew
Directing
- Lee Sang-yongDirector
Writing
- Shin Jai-hoWriter
- Lee Sang-yongAdaptation
- Seo Myeong-jinAdaptation
Production
- Ku Jeong-hoeExecutive Producer
- Seo Myeong-jinProducer
Camera
- Mun Ho-jinDirector of Photography
Editing
- Kyung Min-hoEditor
Sound
- Lee Sang-wookProduction Sound Mixer
- Lee Seung-chulSound Supervisor
Art
- Jeon Jin-wonProduction Design
- Kim Jin-chulProduction Design
Costume & Make-Up
- Han Hye-sookCostume Design
Visual Effects
- Kim Byeong-giSpecial Effects Supervisor
Lighting
- Lee Heung-seongLighting Director