Signal is frequently cited as the best Korean crime drama ever produced, with a time-bending story where a detective uses a mysterious walkie-talkie to solve cold cases. Its tightly written plot earned a 9.2/10 on MyDramaList, beating #5 Reply 1988 by 0.1 points. The show inspired a 2021 Japanese remake and maintained a 97% fresh rating on Rotten Tomatoes, 12% higher than the average K-drama.
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