Season 2
Season 1
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E16: If You Don't Give Up -
E15: Is It Really You? -
E14: Not Now, but Maybe in the Past -
E13: The Real Assailant -
E12: The Case Was Manipulated -
E11: The One Last Case -
E10: Someone Has to Stop the Bad Guys -
E9: Hongwon-dong Case -
E8: How Are You Alive? -
E7: We Must Dig Deeper -
E6: Catch Him by All Means -
E5: Changing the Past Alters the Present -
E4: We Found the Killer -
E3: We Can Prevent the Killings -
E2: We Still Have a Chance -
E1: You're Doomed
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Signal
8.2
14 February 2026
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Crime, Mystery, Sci-Fi & Fantasy, Drama
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mins
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
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Lee Je-hoonPark Hae-young -
Kim Hye-sooCha Soo-hyun -
Cho Jin-woongLee Jae-han -