Dexter Morgan is the protagonist of both the DEXTER television series and the Dexter Book Series. He's introduced as a Serial killer and later, a blood spatter analyst for the Miami Metro Police Department. He has an adoptive sister by the name of Debra Morgan and learns later on that he has a biological brother by the name of Brian Moser. His adoptive parents are Harry and Doris Morgan, unfortunately both have passed away prior to the events of this season.