 Besides Michael C. Hall playing the title character, the show's supporting cast includes Jennifer Carpenter as Dexter's adoptive sister and co-worker (and later boss) Debra, and James Remar as Dexter's adoptive father, Harry Morgan.Dexter's co-workers include Lauren Vélez as Lieutenant (later Captain) María LaGuerta, Dexter and Debra's supervisor, David Zayas as Detective Sergeant (later Lieutenant) Angel Batista, and C. S. Lee as lab tech Vince Masuka (promoted to title credits in season two).Erik King portrayed the troubled Sgt James Doakes for the first two seasons of the show.