Signal — Season 1, Episode 3: We Can Prevent the Killings

Episode synopsis

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.

About Signal


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

More episodes from Season 1

• E1You're Doomed
• E2We Still Have a Chance
• E4We Found the Killer
• E5Changing the Past Alters the Present
• E6Catch Him by All Means
• E7We Must Dig Deeper
• E8How Are You Alive?
• E9Hongwon-dong Case
• E10Someone Has to Stop the Bad Guys
• E11The One Last Case
• E12The Case Was Manipulated
• E13The Real Assailant