![Signal Season 1 Episode 1 Signal Season 1 Episode 1](http://images.weserv.nl/?url=//image.tmdb.org/t/p/w185/eOdtj7voayNA3hD61OKuyMtK2EX.jpg)
Signal Season 1 Episode 1
Haunted by a classmate’s kidnapping 15 years ago, Park Hae Young becomes a police profiler who’s lost faith in the police force. This all changes when he stumbles upon an old radio that’s receiving transmissions from the past.