Barnes is best known for his roles as Sergeant First Class Hector Williams in the CBS television series The Unit, the archangel Raphael in Supernatural and Deputy Chief Christian Garland in Law & Order: Special Victims Unit.
Barnes is recognized for his acting roles as Sergeant First Class Hector Williams in The Unit, the archangel Raphael in Supernatural, and Deputy Chief Christian Garland in Law & Order: Special Victims Unit.