Señal
시그널 (original)
Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.
Starring Lee Je-hoon, Kim Hye-soo, Cho Jin-woong, Jang Hyun-sung, Jung Hae-kyun, Kim Won-hae, Jung Han-bi, Lee Yoo-jun, Kim Min-gue, Son Hyeon-ju
Watch "Señal" on Amazon Prime released in 2016. It's a crime and fantasy show, and has a rating of 8.5 out of 10 from Imdb which is very high for this kind of show.