I often have doubts about crime dramas due to alot of the unoriginal developments in storylines, but Signal could never. This was a drama that did NOT disappoint from start to finish - in fact, the heart-stopping end to every episode had me wanting more. The artistic camerawork, captivating nonlinear narrative, sophisticated direction, unique plot twists, compelling performance, highly-constructed alternate timelines, and last but not least, the suspense and anticipation was what made a drama like Signal worth watching. The drama was extremely unique and satisfying to watch in that it hinged on one specific object, and that object's ability to dictate the fates of the main characters, including every decision bound by it. Finally, the series also received widespread acclaim from audience and critics alike so what more can I say?

However, there were some things which I felt could've been better explained at the end. For example, I couldn't quite grasp how that walkie-talkie ended up sending radio transmissions in the first place, and felt disappointed that those mere last 3 minutes didn't allow the audience to really get a taste of satisfaction (despite the great outcome being deduced). Extending to include just some couple more scenes to see everything tie in such as having Park Hae-young and Cha Soo-hyun appear at Lee Jae-han's hospital door (so I could finally exclaim with joy and satisfaction the words: "FINALLY/YES" would have really been the cherry on top.

Storyline -- original screenplay, highly engaging, well-developed script;

Cast (supporting included) -- remarkable performance by each actor's ability to convey emotions and thoughts through eyes and body language effortlessly;

OST -- adapted from old school melodies (ie. pre-2010 Korean OSTs) was an unconventional move, but at the same time, so fitting as it only gave the drama way more character and depth.