The first season of the NBC American supernatural drama series Grimm premiered on October 28, 2011, and concluded on May 18, 2012. It consisted of 22 episodes. The series, created by David Greenwalt, Jim Kouf and Stephen Carpenter, follows the last known descendant of the Grimm line, Nick Burkhardt, as he deals with being a cop, and trying not to expose his secret as a Grimm.

In March 2012, NBC renewed the show for a second season of 22 episodes, which premiered on Monday, August 13, 2012, and continued on Mondays for four episodes, before returning to its original Friday timeslot on September 10. On April 19, 2013, NBC announced they would move Grimm to Tuesdays beginning on April 30, 2013 for the remainder of Season 2 until May 21 after The Voice replacing Ready for Love. The third season premiere will return the show to its original Friday timeslot.

The third season of the NBC American supernatural drama series Grimm was announced on April 26, 2013. It is set to consist of 22 episodes. The series, created by David Greenwalt, Jim Kouf and Stephen Carpenter, follows a descendant of the Grimm line, Nick Burkhardt, as he deals with being a cop, and trying not to expose his secret as a Grimm.

The fourth season of the NBC American supernatural drama series Grimm was announced on March 19, 2014. It is set to consist of 22 episodes. The series, created by David Greenwalt, Jim Kouf and Stephen Carpenter, follows a descendant of the Grimm line, Nick Burkhardt, as he deals with being a cop, and trying not to expose his secret as a Grimm.