Season 1
Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.
Episodes
1 You're Doomed Jan 22, 2016 
2 We Still Have a Chance Jan 23, 2016 
3 We Can Prevent the Killings Jan 29, 2016 
4 We Found the Killer Jan 30, 2016 
5 Changing the Past Alters the Present Feb 5, 2016 
6 Catch Him by All Means Feb 6, 2016 
7 We Must Dig Deeper Feb 12, 2016 
8 How Are You Alive? Feb 13, 2016 
9 Hongwon-dong Case Feb 19, 2016 
10 Someone Has to Stop the Bad Guys Feb 20, 2016 
11 The One Last Case Feb 26, 2016 
12 The Case Was Manipulated Feb 27, 2016 
13 The Real Assailant Mar 4, 2016 
14 Not Now, but Maybe in the Past Mar 5, 2016 
15 Is It Really You? Mar 11, 2016 
16 If You Don't Give Up Mar 12, 2016