Through a mysterious Motorola phone, two detectives - one from the present, and the other from 15 years in the past - begin communicating and working together to solve cold cases.
| Title | Unknown Number |
|---|---|
| Year | 2019 |
| Genre | Mystery, Crime, Sci-Fi & Fantasy |
| Country | China |
| Studio | Tencent Video |
| Cast | Du Chun, Li Xiaoran, Wang Tianchen, Ma Rui, Cheng Fang Xu, Zhao Qianzi |
| Crew | Han Zeng Guang (Director) |
| Alternative Titles | 信号signal, Unknown Number |
| Keyword | detective, remake, murder, serial killer, signal, police department, police profiling |
| First Air Date | Oct 23, 2019 |
| Last Air date | Nov 27, 2019 |
| Season | 1 Season |
| Episode | 32 Episode |
| Runtime | 45:14 minutes |
| Quality | HD |
| IMDb: | 7.00/ 10 by 1.00 users |
| Popularity | 1.3098 |
| Language | Mandarin |
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