Signal: Season 1
This season started on January 22, 2016. The table lists episodes with recorded air dates up to September 28, 2026.
| Ep | Title and air date | My place |
|---|---|---|
| 1 | You're Doomed · 67 min | |
| 2 | We Still Have a Chance · 66 min | |
| 3 | We Can Prevent the Killings · 65 min | |
| 4 | We Found the Killer · 65 min | |
| 5 | Changing the Past Alters the Present · 68 min | |
| 6 | Catch Him by All Means · 70 min | |
| 7 | We Must Dig Deeper · 67 min | |
| 8 | How Are You Alive? · 74 min | |
| 9 | Hongwon-dong Case · 74 min | |
| 10 | Someone Has to Stop the Bad Guys · 72 min | |
| 11 | The One Last Case · 78 min | |
| 12 | The Case Was Manipulated · 78 min | |
| 13 | The Real Assailant · 74 min | |
| 14 | Not Now, but Maybe in the Past · 74 min | |
| 15 | Is It Really You? · 72 min | |
| 16 | If You Don't Give Up · 89 min |
