Monroe hasn't had a very good year, and it's about to get worse.
On Friday's Grimm (9/8c, NBC), after some children died in a mysterious fire that may have been set by a Wesen, Nick (David Giuntoli) turns to an old enemy for help in the investigation. He's not the only one unhappy with the decision though.
Check out the exclusive sneak peek below to see why Monroe (Silas Weir Mitchell) is about to clean this guy's clock, metaphorically of course.
Grimm airs Friday at 9/8c on NBC before going on hiatus until March 20.