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Signal

TV·2016–present·1 season, 16 episodes·tvN·Crime, Mystery, Sci-Fi & Fantasy·8.2·Created by Kim Eun-hee, Kim Won-suk

Streaming on (US) NetflixAmazon Prime VideoSee all


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

Highest-rated episodes all ranked

  1. 01Signal S01E08How Are You Alive?S01E08 · 8.6Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
  2. 02Signal S01E01You're DoomedS01E01 · 8.4Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
  3. 03Signal S01E09Hongwon-dong CaseS01E09 · 8.4Hae-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.

Castfull cast & details

Lee Je-hoonLee Je-hoonPark Hae-youngKim Hye-sooKim Hye-sooCha Soo-hyunCho Jin-woongCho Jin-woongLee Jae-hanJang Hyun-sungJang Hyun-sungKim Bum-jooJung Hae-kyunJung Hae-kyunAhn Chi-sooKim Won-haeKim Won-haeKim Gye-chulJung Han-biJung Han-biOh Yoon-seoLee Yoo-junLee Yoo-junJung Heon-gi

Episodes by season

Season01Episode ratings across the season — the gold bar is its best episode16Episodes2016Aired 8.1Season avg
  1. S01E01Signal S01E01You're DoomedJanuary 22, 2016 8.4Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
  2. S01E02Signal S01E02We Still Have a ChanceJanuary 23, 2016 8.2The 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. S01E03Signal S01E03We Can Prevent the KillingsJanuary 29, 2016 8.0Reality changes after Hae-young exchanges information with Jae-han. Hae-young tries to work together with Jae-han in 1989 to prevent the nex
  4. S01E04Signal S01E04We Found the KillerJanuary 30, 2016 8.0The 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
  5. S01E05Signal S01E05Changing the Past Alters the PresentFebruary 5, 2016 7.5Hae-young starts to investigate Jae-han's disappearance. Jae-han's former colleagues get suspicious about seeing Hae-young digging into the
  6. S01E06Signal S01E06Catch Him by All MeansFebruary 6, 2016 8.0Seeking vengeance for the events that lead to the death of his daughter, Kyung-tae commits a kidnapping after getting out of prison for burg
  7. S01E07Signal S01E07We Must Dig DeeperFebruary 12, 2016 7.8Jae-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. S01E08Signal S01E08Season's bestHow Are You Alive?February 13, 2016 8.6Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
  9. S01E09Signal S01E09Hongwon-dong CaseFebruary 19, 2016 8.4Hae-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
  10. S01E10Signal S01E10Someone Has to Stop the Bad GuysFebruary 20, 2016 7.8The 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
  11. S01E11Signal S01E11The One Last CaseFebruary 26, 2016 7.8Hae-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. S01E12Signal S01E12The Case Was ManipulatedFebruary 27, 2016 8.2Hae-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. S01E13Signal S01E13The Real AssailantMarch 4, 2016 8.0Soo-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
  14. S01E14Signal S01E14Not Now, but Maybe in the PastMarch 5, 2016 8.0Hae-young realizes the possibility that his brother could have been murdered after learning from Hye-seung that Sun-woo was not guilty.
  15. S01E15Signal S01E15Is It Really You?March 11, 2016 8.0Hae-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
  16. S01E16Signal S01E16If You Don't Give UpMarch 12, 2016 8.4Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.

Season 1 ranked & reviewed

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