April 26, 2013
NBC announced today that it has renewed Grimm for a third season. The fantasy drama is enjoying a solid second season, currently ranking as Friday's #1 series among adults 18-49. Its ratings in the demographic actually improved 14% over its first season, with total viewership also up roughly 12%.
The network ordered 22 new episodes for Season 3 of Grimm, which will return for the 2013-2014 season.
UPDATE: Season 3 of Grimm will premiere on Friday, October 25, 2013 at 9:00pm.
(Source: TV by the Numbers)