The history site provides an overview of all changes that have been made on this omdb site.
| System | 2021-01-20 22:14 | changed external link to freenet Video |
| 2020-06-08 16:11 | alias Death Bell | |
| Jo (Contribs) | changed external link to https://www.imdb.com/title/tt1438522/ | |
| effenberg (Contribs) | 2011-02-17 11:25 | Category Race Against Time |
| effenberg (Contribs) | 2010-08-26 13:06 | Category Brutality |
| Category Violence | ||
| Category Blood | ||
| Category Exam | ||
| 2010-08-26 13:05 | ||
| Category Teacher | ||
| Category Riddle | ||
| Category Torture | ||
| 2010-08-26 13:04 | Category Present | |
| Category South Corea | ||
| Category Seoul | ||
| Category Killer | ||
| Category Murder | ||
| Category Serial Killer | ||
| 2010-08-26 13:03 | Category Classroom | |
| Category School | ||
| Category Pupil | ||
| Category School bus | ||
| Category Suspenseful | ||
| Category Rough | ||
| Category Slasher Film | ||
| 2010-08-26 13:02 | Da-Geon as Actor | |
| In-sook Choi as Actor | ||
| Beom-su Lee as Actor | ||
| 2010-08-26 13:01 | Shin-ae Yu as Actor | |
| Gyu-ri Nam as Actor | ||
| 2010-08-26 13:00 | Yu Yeong-ju as Editor | |
| Seong-ryong Heo as Director of Photography | ||
| Jun-seong Kim as Director of Photography | ||
| 2010-08-26 12:59 | Yoon Hong-Seung as Screenplay | |
| Kim Eun-Kyeong as Screenplay | ||
| Yoon Hong-Seung as Director | ||
| 2010-08-26 12:58 | changed Runtime from 0 to 88 | |
| release date set to 2008-08-06 | ||
| Language Korean |