Hell, never mind scary.. just have some logic and realism when it comes to how the characters interact with each other, their jobs, and the world at large, etc.. It's just so fucking fake. I literally haven't watched it since that awful awful awful scene in which the police lieutenant guy goes up to Grimm and says something along the lines of "So you killed a guy today. Great jorb! See you tomorrow at work! Obviously you won't have any psychological issues stemming from killing another person, nor will you have to face any sort of internal investigation to ensure that the shooting was justified!"