Signal

A police officer and criminal profiler, who witnessed a kidnapping fifteen years ago, discovers a walkie-talkie that connects him with a detective from the past, and together with another detective, they solve cold cases by sharing information and working as a team to bring justice to long-unsolved crimes. Signal is a 2016 Korean Korean-language show featuring Lee Je-hoon, Kim Hye-soo and Cho Jin-woong. The series is inspired from Frequency by Toby Emmerich. AStory was the production house involved in the project along with executive producer(s) Lee Jae-moon and Park Eun-kyung. Signal is written by Kim Eun-hee and directed by Kim Won-seok. tvN acquired the distribution rights for the television show. Creators of the series include Choi Jin-hee and Park Ji-young. Signal has only one season and a cumulative total of 16 episodes which have a running time of 64-88 minutes each. Cinematography was done by Choi Sang-mook and Lee Joo-young. The music was composed by Kim Joon-seok along with Park Sung-il.