Signal - Season 1

First aired: 1/22/2016 16 episodes

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

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Episodes

1. You're Doomed

Aired: 1/22/2016

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

2. We Still Have a Chance

Aired: 1/23/2016

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.

3. We Can Prevent the Killings

Aired: 1/29/2016

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.

4. We Found the Killer

Aired: 1/30/2016

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.

5. Changing the Past Alters the Present

Aired: 2/5/2016

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

6. Catch Him by All Means

Aired: 2/6/2016

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.

7. We Must Dig Deeper

Aired: 2/12/2016

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.

8. How Are You Alive?

Aired: 2/13/2016

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

9. Hongwon Dong Case

Aired: 2/19/2016

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.

10. Someone Has to Stop the Bad Guys

Aired: 2/20/2016

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.

11. The One Last Case

Aired: 2/26/2016

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.

12. The Case Was Manipulated

Aired: 2/27/2016

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.

13. The Real Assailant

Aired: 3/4/2016

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.

14. Not Now, But Maybe In The Past

Aired: 3/5/2016

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

15. Is It Really You?

Aired: 3/11/2016

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.

16. If You Don't Give Up

Aired: 3/12/2016

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