Signal
시그널
“A walkie-talkie links a present-day profiler to a detective in the past”
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
Lee Je-hoon
as Park Hae-young · LEAD
Lee Je-hoon
Park Hae-young
Kim Hye-soo
as Cha Soo-hyun · LEAD
Kim Hye-soo
Cha Soo-hyun
Cho Jin-woong
as Lee Jae-han · SUPPORTING
Cho Jin-woong
Lee Jae-han
Jang Hyun-sung
as Kim Bum-joo · SUPPORTING
Jang Hyun-sung
Kim Bum-joo
Jung Hae-kyun
as Ahn Chi-soo · SUPPORTING
Jung Hae-kyun
Ahn Chi-soo
Kim Won-hae
as Kim Gye-chul · SUPPORTING
Kim Won-hae
Kim Gye-chul
Jung Han-bi
as Oh Yoon-seo · SUPPORTING
Jung Han-bi
Oh Yoon-seo
Lee Yoo-jun
as Jung Heon-gi · SUPPORTING
Lee Yoo-jun
Jung Heon-gi
Streaming
Where to watch
Availability varies by region · Data by JustWatch via TMDB
Quick verdict
Should you watch?
A masterful, emotional time-crossing crime thriller.
✓Fans of cold-case thrillers, time-bending mysteries, and tightly plotted crime drama
✗You want romance or a light tone over intense, intricate plotting
Story
What is it really about
A modern criminal profiler discovers an old radio that lets him talk to a detective decades earlier, and together — across time — they reopen cold cases. A landmark time-bending crime thriller.
Did you know
Trivia & facts
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FAQ