Signal

Name: Signal
Genre: Crime, Mystery, Sci-Fi & Fantasy, Drama
Released: 2016-01-22
Rating: 8.2
Cast: Lee Je-hoon, Kim Hye-soo, Cho Jin-woong

ENDED2 Seasons16 Episodes★ 8.2

Signal is a crime and mystery series on tvN that premiered in 2016, with 2 seasons and 16 episodes to date. The next episode, Season 2 Episode 1, airs on Dec 7, 2026.

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NetworktvN

First AiredJan 22, 2016

Last AiredMar 12, 2016

GenreCrime, Mystery, Sci-Fi & Fantasy, Drama

Created ByKim Eun-hee, Kim Won-suk

Original Title시그널

LanguageKorean

CountrySouth Korea

ProductionAStory, Studio Dragon, BA Entertainment

 Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.

NEXT EPISODE

S2 E1Episode 1Dec 7, 202640d

WHERE TO WATCH

Netflix

Amazon Prime Video

WeTV

Some links may earn us a commission. Data via JustWatch / TMDB

Cast

Lee Je-hoon

Park Hae-young

Kim Hye-soo

Cha Soo-hyun

Cho Jin-woong

Lee Jae-han

Seasons & Episodes2 seasons · 24 episodes

0% complete

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

E1You're Doomed

Jan 22, 201667m★ 8.4

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

E2We Still Have a Chance

Jan 23, 201666m★ 8.2

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.

E3We Can Prevent the Killings

Jan 29, 201665m★ 8.0

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.

E4We Found the Killer

Jan 30, 201665m★ 8.0

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.

E5Changing the Past Alters the Present

Feb 5, 201668m★ 7.5

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

E6Catch Him by All Means

Feb 6, 201670m★ 8.0

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.

E7We Must Dig Deeper

Feb 12, 201667m★ 7.8

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.

E8How Are You Alive?

Feb 13, 201674m★ 8.6

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

E9Hongwon-dong Case

Feb 19, 201674m★ 8.4

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.

E10Someone Has to Stop the Bad Guys

Feb 20, 201672m★ 7.8

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.

E11The One Last Case

Feb 26, 201678m★ 7.8

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.

E12The Case Was Manipulated

Feb 27, 201678m★ 8.2

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.

E13The Real Assailant

Mar 4, 201674m★ 8.0

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.

E14Not Now, but Maybe in the Past

Mar 5, 201674m★ 8.0

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

E15Is It Really You?

Mar 11, 201672m★ 8.0

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.

E16If You Don't Give Up

Mar 12, 201689m★ 8.4

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

About Signal

Signal is a crime, mystery, sci-fi & fantasy, drama series on tvN. The show first aired on Jan 22, 2016 and currently has 2 seasons and 16 episodes. Signal is currently airing; the next episode airs on Dec 7, 2026. It has a rating of 8.2/10 based on 207 votes. The cast includes Lee Je-hoon, Kim Hye-soo, Cho Jin-woong. Created by Kim Eun-hee and Kim Won-suk.