Signal is not only the best Kdrama I've ever seen (out of 206). Signal is not just the best Kdrama of all time. Signal is a paradigm shift. Signal tells the world loud and clear: South Korea is making TV shows as good as the USA or the UK, as good as anyone. Period. The bar has been raised, South Korea. I expect more from you now. I expect more Signals. I don't know what else I can add about this drama. It is a perfect 10 in all categories. Heck, even the soundtrack is the best I've ever heard - perfect atmospheric music for every scene. This drama has no flaws. It is nearly as good as the best American TV I've seen. So, what else can I say? I guess this. I'm about to take the 205 other Kdramas I've completed and change their ratings down 1/2 point so that Signal can stand alone at 10. No other drama, not even White Christmas, deserves to stand at 10 with Signal.