Sixteen Korean episodes, ten Japanese ones, and a film that follows only the Japanese set.
The Korean series, all sixteen, and do not start with the Japanese one. A detective in the present finds a walkie-talkie that reaches a detective in 1989, and each change they make to an old case changes the present around them. The Korean version tells that story to an ending. The Japanese version is a separate remake that then continued past where it stopped, which is only interesting once you know the original.
Seen some of these already? Tap the circles to tick them off. The full list below fills in as you go.
Sixteen episodes on tvN, 22 January to 12 March 2016. Cold cases, a radio that should not work, and a structure that pays off.
Only afterwards, and only if you want it. A remake on Fuji TV with the same premise and different cases.
Continues the Japanese series rather than the Korean one. It needs the Japanese remake and nothing else.
Then what? A second Korean season was confirmed to be in production in March 2024. Nothing has aired and no date has been given, so it is not listed here.
A suggested way in, not an official one. The full list is below: tick anything off in either place.
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