There's a big spread between very good BLs and what-the-hell-was-that BLs. UNKNOWN sits comfortably in the very-good list. It's no pastel-wonderland romance, instead the feel and look of this drama is both gritty and realistic. There's no backdrop of unlikely wealth, no ultra spacious homes and no sudden rise to success. People slog here. They work and study hard here. Nothing's easy or given. Also, this series managed to produce two solid characters: the leads always remain true to their given character constructs, and yet, they both show believable emotional growth over the years that covers the story's arc. Matter of fact, all of the characters within this drama are interesting and dimensional: the bad guy is not a total black hat, the good doctor doesn't wear a halo, and the stead-fast good friend is both steady and a little fast. I have a few minor quibbles with the story resolution, but overall, I really enjoyed this series and am glad that I had the patience to wait until the 12th episode was out before I dove in. Because seriously, there's enough cliffhangers in UNKNOWN to really do some damage on a person if they couldn't happily binge. (Sidenote: It took me a few scenes to recognize Sam Lin from WE BEST LOVE. He looks different and played his part so well, I couldn't connect him to the character he played in WBL.)