Simplify the following text for a Grade 7 native English-speaking person.
Original: Dexter is an American television drama series that centers on Dexter Morgan ( Michael C. Hall ) , a forensic bloodstain pattern analyst for the Miami Metro Police Department who moonlights as a serial killer .
Simplified: The show tells a story about a serial killer , Dexter Morgan , who works as a forensics analyst for the police . The main actor of the show is Michael C. Hall .