The series initially garnered mixed reviews from critics, though reception grew more favorable throughout the series' run. a dark and fantastical project about a world in which characters inspired by Grimms' Fairy Tales exist', though the stories and characters inspiring the show are also drawn from other sources. It has been described as 'a cop drama-with a twist. In January 2011, the series moved to NBC. Grimm was originally developed for CBS, but did not end up moving forward due to the 2007–08 writers' strike. The series features a supporting cast with Russell Hornsby, Bitsie Tulloch, Silas Weir Mitchell, Sasha Roiz, Reggie Lee, Bree Turner, and Claire Coffee.

The series' narrative follows Portland homicide detective Nicholas Burkhardt (played by David Giuntoli), who discovers he is a Grimm, the latest in a line of guardians who is sworn to keep the balance between humanity and mythological creatures, known as Wesen. The series aired from October 28, 2011, to March 31, 2017, for 123 episodes, over six seasons.

Grimm is an American fantasy police procedural drama television series created by Stephen Carpenter, Jim Kouf and David Greenwalt, and produced by Universal Television for NBC.