It is difficult to watch Grimm without immediately drawing comparisons to Supernatural. Ok it may focus specifically on the stories of Grimm's Fairytales specifically but within the first fifteen minutes of the pilot Detective Burkhardt learns not only that he comes from a long line of monster hunters but also that his parents may have been killed as a result.
Much like a more orthodox police procedural each episode of Grimm finds Burkhardt and his partner attempting to solve a different case and while this certainly makes for a watchable hour of television something more is required if I am going to come back week after week. Supernatural certainly has its fair share of standalone episodes but it was always the dark humour and evolving five season story arc involving the brother's attempts to avert the apocalypse that kept me hooked and, while it certainly improved as the season progressed, I still found Grimm lacking slightly in both respects.
Much of the cast, including lead David Giuntoli, are certainly competent enough but it is difficult to describe any of the characters, other than possibly his werewolf friend, as particularly memorable. In fact that can probably be said about the show as a whole, competent but unmemorable.