In the first ever episode of GRIMM, three best friends, Colby, Laura and Marina, take on the Cheshire Home Invasion.

The quiet, affluent town of Cheshire, CT was turned upside down overnight when two parolees, Joshua Komisarjevsky and Steven Hayes, broke into the home of the Petit family at 3am on July 23, 2007, where they terrorized Dr. William Petit, Jennifer Hawke-Petit and their two daughters, Hayley and Michaela, for the next 7 hours. The tragedy that unfolded is the stuff of nightmares.