Signal2016
There are those who are born monsters, but there are also those who are made into monsters by people.

Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
- Released
- 2. 7. 2026
- Network
- tvN
- Status
- Returning Series
- Seasons
- 3 seasons, 17 episodes aired
- Certification
- TV-MA
- Country, language
- KR · KO
- Community rating
- 8.2 · 186 votes