This is probably the best K-drama I've seen so far. Best plot,cast,music,screenplay,direction and what not!!?? The chills it gives during each and every scene is so deep that the feeling is still lingering in my heart. Each and every time you expect one and what happens is completely out of your thinking. The bond between Lee Jae Han and Park Hae Young is so beautifully portrayed. Not too much into love, but still the scenes which depicts the bond between Lee Jae Han and Cha Soo Hyun is lovely! The way the director deals with the 4 cases taken for the support is also too good. Even though its a peak thriller, it makes you smile at times!! If you think you are the one who craves for a spine chilling thriller, Signal is for you!!