Signal Two detectives communicate through a walkie-talkie to solve a cold case. One detective exists in the present day, and the other detective exists 15 years in the past. Details Casts Galleries Posters Season Lists Title Signal Genres Crime Drama Mystery First Air Date 2018-04-10 Last Air Date 2018-06-12 Episode Runtime 00 Hours 54 Minutes Total Season(s) 1 Total Episode(s) on All Seasons 10 Runtime 54 Production Companies Unknown Kentaro Sakaguchi... Kento Saegusa... Kazuki Kitamura... Takeshi Ooyama... Michiko Kichise... Misaki Sakurai... Yuichi Kimura... Tsutomu Yamada... Tetsuhiro Ikeda... Shinya Kojima... Kaede Aono... Rika Anzai... Fuju Kamio... Ryota Kato... Atsuro Watabe... Shinnosuke Nakamoto... Takemi Fujii... ... Masahiro Koumoto... Kazuo Iwata... Original Size (3840x2160) Original Size (3300x1856) Original Size (1280x720) Original Size (1920x1080) Original Size (3840x2160) Original Size (1280x720) Original Size (500x750) Original Size (1456x2184) Original Size (680x1020) Original Size (627x941) Original Size (500x750) Original Size (500x750) Original Size (1200x1600) Season 1 10 Episode(s) 2018-04-10