Two detectives communicate through a walkie-talkie to solve a cold case. One detective exists in the present day, and the other detective exists 15 years in the past.
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| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | You're Doomed | 2016-01-22 | 60 min |
| Season 1 | Episode 2 | We Still Have a Chance | 2016-01-23 | 60 min |
| Season 1 | Episode 3 | We Can Prevent the Killings | 2016-01-29 | 60 min |
| Season 1 | Episode 4 | We Found the Killer | 2016-01-30 | 60 min |
| Season 1 | Episode 5 | Changing the Past Alters the Present | 2016-02-05 | 60 min |
| Season 1 | Episode 6 | Catch Him by All Means | 2016-02-06 | 60 min |
| Season 1 | Episode 7 | We Must Dig Deeper | 2016-02-12 | 60 min |
| Season 1 | Episode 8 | How Are You Alive? | 2016-02-13 | 60 min |
| Season 1 | Episode 9 | Hongwon Dong Case | 2016-02-19 | 60 min |
| Season 1 | Episode 10 | Someone Has to Stop the Bad Guys | 2016-02-20 | 60 min |
| Season 1 | Episode 11 | The One Last Case | 2016-02-26 | 75 min |
| Season 1 | Episode 12 | The Case Was Manipulated | 2016-02-27 | 75 min |
| Season 1 | Episode 13 | The Real Assailant | 2016-03-04 | 75 min |
| Season 1 | Episode 14 | Not Now, But Maybe in the Past | 2016-03-05 | 75 min |
| Season 1 | Episode 15 | Is It Really You? | 2016-03-11 | 75 min |
| Season 1 | Episode 16 | If You Don't Give Up | 2016-03-12 | 75 min |
| Production | Takashi Hagiwara | Producer |
| Directing | Kosuke Suzuki | Director |
| Directing | Akira Uchikata | Director |
| Writing | Masaya Ozaki | Screenplay |
| Production | Kasaoki Takahiro | Producer |
| Production | Ishida Mai | Producer |
| Sound | Asami Tachibana | Original Music Composer |
| Sound | Yuki Hayashi | Original Music Composer |
| Writing | Kim Eun-hee | Original Series Creator |
