Signal

About Signal

Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.

tvN's Signal is a crime, mystery, and science fiction series. Its themes are awestruck, dark, tragic past, and changing the past or future.

Its 2 seasons and 24 episodes aired between January 2016 and March 2016. Seasons run to about 12 episodes.

Lee Je-hoon leads the cast as Park Hae-young, Kim Hye-soo as Cha Soo-hyun, and Cho Jin-woong as Lee Jae-han. Produced by AStory.

American members can watch it on Amazon Prime Video, Amazon Prime Video with Ads, and Netflix. Taboo, Flower of Evil, and Beyond Evil make useful companions to Signal, all filed under corruption and investigation. TMDB voters put it at 8.2 out of 10 across 203 votes and it carries a TV-MA rating.