Signal (2016)
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.
2 seasons, 24 episodes · First aired 2016-01-22 · Crime, Mystery, Sci-Fi & Fantasy, Drama
Created by Kim Eun-hee, Kim Won-suk
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