Signal

2016-01-22 · Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.

S01 E01 · 2016-01-22 · 67 min

You're Doomed

Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.

S01 E02 · 2016-01-23 · 66 min

We Still Have a Chance

The statute of limitations is lifted after the suspect's arrest. Hae-young joins Soo-hyun's team for the newly established cold case squad.

S01 E03 · 2016-01-29 · 65 min

We Can Prevent the Killings

Reality changes after Hae-young exchanges information with Jae-han. Hae-young tries to work together with Jae-han in 1989 to prevent the next murder.

S01 E04 · 2016-01-30 · 65 min

We Found the Killer

The ninth victim is Won-kyung, the woman Jae-han loves. A driver turns himself in, but Soo-hyun and Jae-han determine that his son is the real killer.

S01 E05 · 2016-02-05 · 68 min

Changing the Past Alters the Present

Hae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the past.

S01 E06 · 2016-02-06 · 70 min

Catch Him by All Means

Seeking vengeance for the events that lead to the death of his daughter, Kyung-tae commits a kidnapping after getting out of prison for burglary.

S01 E07 · 2016-02-12 · 67 min

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.

S01 E08 · 2016-02-13 · 74 min

How Are You Alive?

Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.

S01 E09 · 2016-02-19 · 74 min

Hongwon-dong Case

Hae-young learns that Chi-soo and Jae-han met in 1999 during a case in Inju. After serving time for the crime, Hae-young's brother had killed himself.

S01 E10 · 2016-02-20 · 72 min

Someone Has to Stop the Bad Guys

The bodies discovered in the mountains appear to be more victims of the 1997 serial murder case. Jae-han learns that Soo-hyun became team leader.

S01 E11 · 2016-02-26 · 78 min

The One Last Case

Hae-young and Soo-hyun arrest Jin-woo after coming to the conclusion that he is the killer. Hae-young asks Jae-han about the Inju rape case.

S01 E12 · 2016-02-27 · 78 min

The Case Was Manipulated

Hae-young becomes a suspect for the murder of Chi-soo. Jae-han realizes who the principle offender of the attack on Hye-seung is.

S01 E13 · 2016-03-04 · 74 min

The Real Assailant

Soo-hyun and the others mourn after confirming that the remains belong to Jae-han. Hae-young learns that Jae-han used to look after him in the past.

S01 E14 · 2016-03-05 · 74 min

Not Now, but Maybe in the Past

Hae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.

S01 E15 · 2016-03-11 · 72 min

Is It Really You?

Hae-young is arrested for the murder of Chi-soo. Soo-hyun hears Jae-han apologizing over the radio for not being able to prevent Sun-woo's death.

S01 E16 · 2016-03-12 · 89 min

If You Don't Give Up

Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.