The season masterfully blends police procedural drama with dark fantasy, horror, and serialized mythology. Each episode typically features a "Wesen of the week," while slowly unraveling a larger conspiracy involving Nick’s family, a powerful royal family in Europe, and the hidden balance between humans and Wesen. The core tension of Season 1 is balance vs. chaos . For centuries, a secret code called the Grimm-diaries has helped Grimms identify and neutralize dangerous Wesen. However, not all Wesen are evil; many live peacefully by following a set of laws known as the Verrat (decrees of the Wesen Council). Nick must learn to differentiate between predatory Wesen and innocent ones, a nuance his ancestors rarely acknowledged.

Premiere Date: October 28, 2011 (NBC) Finale Date: May 18, 2012 Episodes: 22 Overview Grimm Season 1 is the origin story of Nick Burkhardt, a Portland homicide detective who discovers he is the last descendant of a long line of hunters known as "Grimms." Unlike the fairy-tale caricatures of the Brothers Grimm, these Grimms are supernatural detectives tasked with keeping humanity safe from Wesen —creatures from fairy tales, folklore, and myth who live secretly among humans.

"There is a fairy tale side of the world you never knew. And it's darker than you ever imagined."