From 2012: David Giuntoli isn’t a household name in every American household… so far. But the star of NBC’s fairytale-derived horror story, “Grimm,” is recognized in just enough A.C. Nielsen monitored homes to make his show this season’s quiet breakthrough. As a Portland, Oregon, detective named Nick Burkhardt, Giuntoli plays the latest in a long line of supernatural detectives policing the strange creatures in his town.