Before Season 1Edit
Mark Stone was one of the original detectives when the Barn started operating.
Stone first appeared as one of the first detectives seen talking on the phone at the Barn in the background as Vic Mackey conversed with Wanda Higoshi. He was later seen still at his desk when Dutch Wagenbach and Claudette Wyms entered the station to follow up with Captain Aceveda on a new case. Stone was later seen that day helping an detective question an Asian suspect while Vic was seen being scoulded by Dutch over the usage of pranks in his desk drawer.