Silas Weir Mitchell (born Silas Weir Mitchell Neilson; September 30, 1969) is an American character actor. He is known for starring as Charles "Haywire" Patoshik in the Fox television series Prison Break (2005โ2007), for the recurring role of Donny Jones in My Name Is Earl (2005โ2009), and as Monroe in the NBC television series Grimm (2011โ2017).