Grimm: Season 4 Episode 13: Trial by Fire
Starring: David Giuntoli, Russell Hornsby, Elizabeth Tulloch, Silas Weir Mitchell, Sasha Roiz, Reggie Lee, Daniel Roebuck
Length: 43 minutes
On Air Date: 13 Feb 2015
Grimm: S04E13 Description: While Nick and Hank investigate the deaths of two teenagers in an arson case they realize they need the help of someone that Nick had arrested several years ago.