Based on Jeff Lindsay’s novels Darkly Dreaming Dexter and Dearly Devoted Dexter this popular Showtime � crime thriller follows Dexter Morgan. Dexter is a forensic blood spatter expert for the Miami Dade Police Department. He is the main support for his sister. He has a steady girlfriend, with two kids who adore him. He also has an active “night life”. Starring Michael C. Hall and Julie Benz.