Signal - 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.

16 Episodes

You're Doomed

Season 1 - Episode 1

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

We Still Have a Chance

Season 1 - Episode 2

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.

We Can Prevent the Killings

Season 1 - Episode 3

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

We Found the Killer

Season 1 - Episode 4

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 re...

Changing the Past Alters the Present

Season 1 - Episode 5

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

Catch Him by All Means

Season 1 - Episode 6

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

We Must Dig Deeper

Season 1 - Episode 7

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...

How Are You Alive?

Season 1 - Episode 8

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

Hongwon Dong Case

Season 1 - Episode 9

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 kille...

Someone Has to Stop the Bad Guys

Season 1 - Episode 10

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 le...

The One Last Case

Season 1 - Episode 11

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.

The Case Was Manipulated

Season 1 - Episode 12

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.

The Real Assailant

Season 1 - Episode 13

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 t...

Not Now, But Maybe In The Past

Season 1 - Episode 14

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

Is It Really You?

Season 1 - Episode 15

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 d...

If You Don't Give Up

Season 1 - Episode 16

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