First teaser trailer for tvN drama series “Signal”

First teaser trailer added for upcoming tvN drama series “Signal” starring Lee Je-Hoon, Kim Hye-Soo and Cho Jin-Woong. The police drama series involves detectives from past and present communicating with each other through a walkie-talkie. They work together to solve the real-life “Hwaseong Serial Murder” case (which movie “Memories of Murder” covered). “Signal” will first air January 22, 2016 in South Korea.