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Shows · Netflix · Crime

Signal poster

SignalNetflix · 2016–

2 seasons on Netflix
  • ★ 8.2
  • TV-MA
  • Crime, Mystery, Science-Fiction, Fantasy, Drama
  • 24 episodes so far
  • South Korea

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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