Scripted series · tvN
Signal
There are those who are born monsters, but there are also those who are made into monsters by people.
Who's in it
Cast
The principal ensemble across the run of the series.
Lee Je-hoon
Park Hae-young
24 eps
Kim Hye-soo
Cha Soo-hyun
24 eps
Cho Jin-woong
Lee Jae-han
24 eps
Jang Hyun-sung
Kim Bum-joo
16 eps
Jung Hae-kyun
Ahn Chi-soo
16 eps
Kim Won-hae
Kim Gye-chul
16 eps
Jung Han-bi
Oh Yoon-seo
16 eps
Lee Yoo-jun
Jung Heon-gi
16 eps
Kim Min-gue
Hwang Ui-kyung
16 eps
Kang Chan-hee
Park Sun-woo
16 eps
Im Hwa-young
Cha Soo-min
16 eps
Choi Woo-ri
Shin Yeo-jin
3 eps
Son Hyun-joo
Jang Young-cheol
5 eps
Ji Hye-in
Girl 3
1 eps
Jang Hyuk-jin
Celebrity News Journalist
1 eps
Oh Yeon-ah
Yoon Soo-ah
2 eps
Song You-hyun
Kang Se-young
2 eps
Seo Jung-joon
Seo Hyung-joon
2 eps
Jeong Jong-yeol
Police Sergeant
2 eps
Sung Hyun-mi
Jung Kyung-soon
3 eps
Kim Ki-cheon
Lee Chan-goo
3 eps
Lee Ki-seop
Lee Jin-hyung
3 eps
Lee Shi-a
Kim Won-kyeong
3 eps
Lee Do-yeop
Detective Park
2 eps
Kim Myeong-joong
Prison Guard
2 eps
Jeong Seok-yong
Oh Gyung-tae
3 eps
Sieun
Oh Eun-ji
3 eps
Yoo Ha-bok
Shin Dong-hoon
3 eps
Sun Yul-woo
Detective
1 eps
Lim Cheol-soo
Informant
3 eps
Lee Dong-ha
Han Se-gyu
3 eps
Yoon Bok-sung
Attorney
1 eps
Park Ji-yeon
Cafe Waitress
1 eps
Lee Na-ra
Shin Da-hye
2 eps
Kim Ryeo-eun
Kim Ji-hee
1 eps
Park Seong-hoon
Detective Jung
1 eps
Lim Yong-soon
Workshop Owner
1 eps
Lee Sang-yeob
Kim Jin-woo
3 eps
Seo Eun-ah
Yoo Seung-yeon
3 eps
Kim Yun-hee
Yoon Sang-mi
3 eps
The Nutevio profile
TV DNA
How Signal actually feels to watch, measured on the traits our editors track across every series.
Signature profile
Signal reads strongest on Tension, Character Depth and Bingeability.
The sustained pressure the series keeps you under.
How fully written and psychologically layered the ensemble is.
How hard it is to stop after one episode.
How often an episode ends on a hook you can't ignore.
How much the series is designed to affect you.
How much each hour depends on the one before it.
The scale, internal logic and texture of the world.
Visual ambition — scale, craft and set-piece filmmaking.
How often the series is genuinely funny, by design.
The story
What it's about
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
The run
Seasons
2 seasons · 17 episodes.
- Poster unavailableSpecials
Season 0 · Complete
Specials
20163 episodes
Season 1 · Complete
Season 1
201616 episodes
8.1IMDbCommunicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.
Best episode · S01E08 How Are You Alive?
- Poster unavailableThe Second Signal
Season 2 · Upcoming
The Second Signal
20268 episodes
Where the series peaks
Best Episodes
The hours that define the show, ranked by audience response and editorial signal.
S01E08 · Signature episode
How Are You Alive?
Soo-hyun and Hae-young notice a connection between the burglary case and Da-hye, the woman who killed herself twenty years ago.
- Directed by Kim Won-suk
S01E16 · Signature episode
If You Don't Give Up
Hae-young is in critical condition after being shot while meeting with Sung-bum. In 2000, Jae-han has been captured by Bum-joo.
- Directed by Kim Won-suk
S01E01 · Signature episode
You're Doomed
Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
- Directed by Kim Won-suk
S01E09 · Signature episode
Hongwon-dong Case
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.
- Directed by Kim Won-suk
S01E02 · Signature episode
We Still Have a Chance
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.
- Directed by Kim Won-suk
S01E12
The Case Was Manipulated
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.
- Directed by Kim Won-suk
Recently aired
Latest Episodes
S01E16 · Signature episode
If You Don't Give Up
- Directed by Kim Won-suk
Behind the series
Created by
Showrunners, creators, executive producers and the writers who set the voice of the series.
The craft
Key Crew
Directing, writing, production, camera, music and editing.
Executive production
- Lee Jae-moonProducer
- Jinnie ChoiExecutive Producer
Direction
- Kim Won-sukDirector
Music
- Park Seong-ilOriginal Music Composer
Where to watch
Streaming
Availability verified against regional listings.
- NetflixStreaming
- Amazon Prime VideoStreaming
- Netflix Standard with AdsStreaming
- Amazon Prime Video with AdsStreaming
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Where to go from here
Watch Next
Our editors' suggestion for the show you should start tonight — and why.
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Another morally complex epic for anyone who wanted more grey.
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If the world-building is what held you, this is the next map to walk.
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Never stop watching
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