- Country: South Korea
- Genres: Crime, Drama, Fantasy
- Release: 2016-02-22
- Director: N/A
- Writers: N/A
- Language: Korean
- Stars: Lee Jehoon , Kim Hye-soo , Cho Jin-woong , Kim Won-hae , Hae-Kyun Jung , Jang Hyun-sung , Ji-man Eom , Hyeon-ju Son , Seok-yong Jeong , Sang-Yeob Lee
- Runtime: 29 min
- Awards: 6 wins & 8 nominations
- AKA: Signal , Sigeuneol (Italy) , Sigeuneol (Mexico) , Signal (Argentina) , Sigeuneol (South Africa) , Signal (Brazil) , Sigeuneol (India) , Sigeuneol (France, French Republic) , Signal (India) , Signal (Turkey) , シグナル (Japan) , Signal (United States of America) , Signal (Thailand) , Signal (Germany) , Sigeuneol (Netherlands the) , Signal (Philippines) , Sigeuneol (Poland) , Signal (Canada) , Сигнал (Russian Federation) , Signal (Egypt) , جرائم لن تحدث (United Arab Emirates) , Sigeuneol (Sweden) , Sigeuneol (Canada) , Sigeuneol (Spain) , Sigeuneol , 시그널 (Korea) , Sigeuneol (Hong Kong) , 信號 (Taiwan) , Signal (United Kingdom) , Sigeuneol (Canada) , Signal (Indonesia) , Sigeuneol (Korea)
- Plot: Fifteen years ago, a female child was kidnapped on the way from school. At that time, Park Hae Yeong, who was an elementary school student, witnessed the girl being taken away. A few days later, the girl was found dead, and detectives couldn't find the culprit. As time went by, Hae Yeong started distrusting the police. Fifteen years later, Hae Yeong is now a police officer and criminal profiler. One day, he finds a walkie-talkie that allows him to get in contact with Detective Lee Jae Han who is in the past. Police officers Hae Yeong, Jae Han and Cha So Hyun then set out on a journey to solve cold cases.
- IMDB:tt5332206
Signal Cast · · · ALL
Lee Jehoon
Park Hae-young
Kim Hye-soo
Cha Soo-hyun
Cho Jin-woong
Lee Jae-han
Jang Hyun-sung
Kim Bum-joo
Kim Won-hae
Kim Gye-chul
Han-bi Jung
Oh Yoon-seo
Min-Kyu Kim
Hwang Ui-kyung
Son Hyun-joo
Jang Young-chul
Kang Chan-hee
Park Sun-woo
Hwa-Young Im
Cha Soo-min