release dates of TV series Signal

Signal is a South Korean crime thriller that weaves together past and present through an extraordinary premise. When a criminal profiler in 2015 discovers an old police walkie-talkie, he finds himself connected to a detective from 1989. This mysterious communication channel allows them to share information across time, opening up the possibility of solving cold cases that have haunted South Korea for decades. As they work together despite the temporal divide, they tackle some of the country's most notorious unsolved crimes, including kidnappings and serial murders. The series explores themes of justice, corruption, and the consequences of altering the past. Each case is based on actual events from Korean history, lending authenticity and emotional weight to the narrative. The collaboration between the two detectives becomes increasingly complex as they realize that changing past events can have unexpected ripple effects on the present, forcing them to confront difficult moral dilemmas about justice and sacrifice.