Season 2 Episode
- Season 1 You're Doomed
- Season 1 We Still Have a Chance
- Season 1 We Can Prevent the Killings
- Season 1 We Found the Killer
- Season 1 Changing the Past Alters the Present
- Season 1 Catch Him by All Means
- Season 1 We Must Dig Deeper
- Season 1 How Are You Alive?
- Season 1 Hongwon Dong Case
- Season 1 Someone Has to Stop the Bad Guys
- Season 1 The One Last Case
- Season 1 The Case Was Manipulated
- Season 1 The Real Assailant
- Season 1 Not Now, But Maybe In The Past
- Season 1 Is It Really You?
- Season 1 If You Don't Give Up
Signal - Season 1 Episode 1 You're Doomed
8.10 48 minutes Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
