Signal2016Crime, Mystery, Sci-Fi & Fantasy, DramaLoading watch options… Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.CreatorsKim Eun-heeKim Won-sukCastLee Je-hoonKim Hye-sooCho Jin-woongJang Hyun-sungJung Hae-kyun
