"Who Are You" started off surprisingly well. It came off as a light crime drama with supernatural aspects. The CG and eFx of the apparitions were well done. Unfortunately, writer used the ghost seeing cop as a gimmick instead of an integral part of the show and tool used to solve crimes. Once the apparition of police inspector Lee Hyun Joon (played wonderfully by Kim Jae Wook) hits the screen everything that had previously been set up is thrown out the window. There was no need to place So Yi Hyun's Team Leader Yang in the department she was in or set things in motion they way it was done if they were only going to work on one crime for the most part. It was a waste and a big let down. To be honest I knew whodunit within the first 8 minutes of episode 1 and I knew the big bad the first moment I saw him on screen. In other words the writing nor the story are anything new or special. The mystery and crimes are not well thought out or delivered. What started with great promise, turned into a plain dime a dozen crime story with a bit of ghostly aide. The main cast was very good. I tend to love Kim Chang Wan, Inspector Choi Moon Shik, in everything he does. He's an entertaining, scene stealing, and versatile actor who never fails me. This was my first time seeing Ok Taec Yeon. He was good. He played his character effortlessly and was very appealing. I even liked So, which is a first. She usually annoys me. Again Kim was excellent. He had very little interaction and because of his character he did most of his acting from the shoulders up. Every movement was done with purpose and it worked. The supports were also well cast. The music was mostly forgettable and if I ever hear that love song again it'll be too soon. I will probably never watch this again. I have no reason or wanting to, but it was worth a watch. It could have been much much better, but it also could have been that much worse. I should really give this a 6, but the cast is better than that. Too bad the script wasn't as good.