Signal: 1x7
We Must Dig Deeper
Jae-han arrests Se-kyu for the serial burglary case, but the culprit is freed after serving a short sentence; Kyung-tae still commits murder.
1 - 1You're Doomed Jan. 22, 2016
1 - 2We Still Have a Chance Jan. 23, 2016
1 - 3We Can Prevent the Killings Jan. 29, 2016
1 - 4We Found the Killer Jan. 30, 2016
1 - 5Changing the Past Alters the Present Feb. 05, 2016
1 - 6Catch Him by All Means Feb. 06, 2016
1 - 7We Must Dig Deeper Feb. 12, 2016
1 - 8How Are You Alive? Feb. 13, 2016
1 - 9Hongwon Dong Case Feb. 19, 2016
1 - 10Someone Has to Stop the Bad Guys Feb. 20, 2016
1 - 11The One Last Case Feb. 26, 2016
1 - 12The Case Was Manipulated Feb. 27, 2016
1 - 13The Real Assailant Mar. 04, 2016
1 - 14Not Now, But Maybe In The Past Mar. 05, 2016
1 - 15Is It Really You? Mar. 11, 2016
1 - 16If You Don't Give Up Mar. 12, 2016