4th Period Mystery (2009): cast, story & where to watch
2009 · Film · ★ 6.2

Released in 2009, 4th Period Mystery is an action, thriller, drama and crime film directed by Sang-yong Lee, running about 86 minutes. “4th Period Murder Mystery” — that tagline sets the tone.
What it’s about. 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.
Who’s in it. 4th Period Mystery stars Yoo Seung-ho as Han Jung-hoon, Kang So-ra as Lee Da-jeong, Sang-geun Jo as Kim Tae-gyoo and Jeong Seok-yong as Kang Gook-man, among others.
How it landed. With an audience score of 6.2/10, 4th Period Mystery has drawn a solid, mixed-to-positive response.
Where to watch. In US you can rent or buy it from Amazon Video. See the full, country-by-country breakdown on our where to watch 4th Period Mystery page.
If you liked it. Fans of 4th Period Mystery tend to enjoy The Dark Knight, The Lord of the Rings: The Return of the King, Inception and The Lord of the Rings: The Fellowship of the Ring.
Frequently asked
- Where can I watch 4th Period Mystery (2009)?
- In US, 4th Period Mystery is available to rent or buy from Amazon Video. Availability varies by country — check our where-to-watch page for every region.
- Is 4th Period Mystery worth watching?
- 4th Period Mystery holds an audience score of 6.2 out of 10, and is a strong pick if you enjoy action, thriller, drama and crime. Reactions are mixed, so it may depend on taste.
- Who stars in 4th Period Mystery?
- 4th Period Mystery stars Yoo Seung-ho, Kang So-ra, Sang-geun Jo, Jeong Seok-yong and Jeon Jun-hong.
- When was 4th Period Mystery released?
- 4th Period Mystery was released in 2009, with a runtime of about 86 minutes.
