
Signal — Season 1
Jan 22, 2016Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.

1. You're Doomed
Jan 22, 2016Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
1h 7m
2. We Still Have a Chance
Jan 23, 2016The statute of limitations is lifted after the suspect's arrest. Hae-young joins Soo-hyun's team for the newly established cold case squad.
1h 6m
3. We Can Prevent the Killings
Jan 29, 2016Reality 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.
1h 5m
4. We Found the Killer
Jan 30, 2016The 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.
1h 5m
5. Changing the Past Alters the Present
Feb 05, 2016Hae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the past.
1h 8m
6. Catch Him by All Means
Feb 06, 2016Seeking vengeance for the events that lead to the death of his daughter, Kyung-tae commits a kidnapping after getting out of prison for burglary.
1h 10m
7. We Must Dig Deeper
Feb 12, 2016Jae-han arrests Se-kyu for the serial burglary case, but the culprit is freed after serving a short sentence; Kyung-tae still commits murder.
1h 7m
8. How Are You Alive?
Feb 13, 2016Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
1h 14m
9. Hongwon-dong Case
Feb 19, 2016Hae-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.
1h 14m
10. Someone Has to Stop the Bad Guys
Feb 20, 2016The 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.
1h 12m
11. The One Last Case
Feb 26, 2016Hae-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.
1h 18m
12. The Case Was Manipulated
Feb 27, 2016Hae-young becomes a suspect for the murder of Chi-soo. Jae-han realizes who the principle offender of the attack on Hye-seung is.
1h 18m
13. The Real Assailant
Mar 04, 2016Soo-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.
1h 14m
14. Not Now, but Maybe in the Past
Mar 05, 2016Hae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.
1h 14m
15. Is It Really You?
Mar 11, 2016Hae-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.
1h 12m
16. If You Don't Give Up
Mar 12, 2016Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.
1h 29m