Duel is Korean thriller sci-fi drama that discusses issues about cloning research, pharmaceutical research and medical ethics. I really love this drama, and I will rewatch it again and again. I am writing this review after rewatching it and I still love it as much as I did when I first watched it. The cast is amazing especially Yang Se Jong. I hope that he plays something similar again because he was impressive in Duel. The soundtrack also fit the drama well. I would totally recommend this drama to anyone but if you're searching for a romance story, you won't find it here.