Grimm is an American dark fantasy crime drama television series created by Stephen Carpenter, David Greenwalt and Jim Kouf. It debuted on NBC on October 28, 2011. The series follows homicide detective Nick Burkhardt (David Giuntoli) who learns that he is a descendant of a group of hunters known as "Grimms", who fight to keep humanity safe from the supernatural creatures of the world. As of March 17, 2017[update], 121 episodes of Grimm have aired.