SIGNAL is simply the best Korean drama to come out in years, crime drama or not, and also on the level of American/british TV productions. Just brilliant.
This drama is a masterpiece - complex plot, authentic characters, great OST. I'm way too emotionally involved with the characters, but this is the best crime drama I've watched. The last episode is a little confusing, but hopefully a season 2 will clear things up. Definitely worth watching 10/10 would recommend!!