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There are those who are born monsters, but there are also those who are made into monsters by people.


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

  1. Kim Eun-hee


  2. Kim Won-suk


Series Cast

  1. Lee Je-hoon as Park Hae-Young

    Lee Je-hoon

    Park Hae-Young

    16 Episodes

  2. Kim Hye-soo as Cha Soo-Hyun

    Kim Hye-soo

    Cha Soo-Hyun

    16 Episodes

  3. Cho Jin-woong as Lee Jae-Han

    Cho Jin-woong

    Lee Jae-Han

    16 Episodes

  4. Jang Hyun-sung as Kim Bum-Joo

    Jang Hyun-sung

    Kim Bum-Joo

    16 Episodes

  5. Jung Hae-kyun as Ahn Chi-Soo

    Jung Hae-kyun

    Ahn Chi-Soo

    16 Episodes

  6. Kim Won-hae as Kim Gye-Chul

    Kim Won-hae

    Kim Gye-Chul

    16 Episodes

  7. Jung Han-bi as Oh Yoon-Seo

    Jung Han-bi

    Oh Yoon-Seo

    16 Episodes

  8. Lee Yoo-jun as Jung Heon-Gi

    Lee Yoo-jun

    Jung Heon-Gi

    16 Episodes

  9. Kim Min-gue as Hwang Ui-Kyung

    Kim Min-gue

    Hwang Ui-Kyung

    16 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 1 - Signal

Season 1

2016 | 16 Episodes

Season 1 of Signal premiered on January 22, 2016.

View All Seasons



Original Name 시그널

Status Ended


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Type Scripted

Original Language Korean


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