Who Are You starts off as an episodic drama, with a ghost-of-the-week sort of feel. Each ghost has a different purpose for haunting Si Ohn, and its their items in the Lost and Found that bring about their appearance. Slowly, though, pieces begin to fall into place, and it turns out that each ghost was not random at all. I won't go into detail, of course, lest that spoil anything for you. Taecyeon is remarkable in his easy portrayal of characters, and I've been impressed with him since Cinderella's Sister and Dream High. I was excited to see what he could do with Cha Gun Woo, and he didn't disappoint. He's got a lot of spunk, for sure, and thinks a little too highly of himself, but he goes to incredible lengths to protect those he cares about. Cha Gun Woo's character goes through the emotional wringer throughout this series, and Taecyeon pulls it off with flying colors. His chemistry with So Yi Hyun, by the way? Crackling. As is Yi Hyun's chemistry with Kim Jae Wook. Basically it's a bowl full of crackling, heartbreaking chemistry where you just don't know where your allegiances lie until the last possible moment. Of the three, Kim Jae Wook impressed me the most, though--his character is given very few lines in the first half of the drama, but he carries his scenes with a finesse that tells of his acting experience. As I'd only seen him as a supporting character before, I was impressed by the sheer amount of dynamism he brought to his role. The music is lovely, too, and I find myself humming the ballad insert song "Because Love Grows" all the time. I will say the series is a bit slow to pick up, but once it does it takes off like a shot. For example, when Yang Si Ohn first starts seeing ghosts, she freaks out EVERY. TIME. It gets to the point where you kind of want to just shake her and go "how is this still surprising you??" We also don't discover much about her backstory until later in the series. But once again, the build up is palpable and well worth the wait--everything is tied together, and I felt my heart clench with each new reveal. Even side characters in this series (like Cha Gun Woo's subordinates or his superior, Moon Shik, the hacker he blackmails into doing his dirty tech work--and Si Ohn's friend and spiritual advisor Hee Bin) steal their scenes with either cuteness or masterful acting. I never felt like I was sitting through a filler moment. If you're looking for an action packed crime thriller, Who Are You isn't it. It's a nuanced look at the small-time cases of the Lost and Found center, and the dramatic rediscovery of Yang Si Ohn's memories. While there are fights, and losses, they are not the beating center of the story. Instead, I really liked the concentration on the relationships between the characters, and how major plot points affect them. Who Are You was well worth the wait.