Dexter Morgan is the lead character in Showtime's Dexter series, known for being both a forensic technician specializing in bloodstain pattern analysis and a vigilante serial killer. Dexter is highly intelligent, methodical, and analytical, with a deep fascination for blood spatter and its patterns. He is sociopathic with a strict moral code, exclusively targeting murderers and other criminals who have escaped justice. Dexter is charming, but also secretive, keeping his dark impulses and deeds hidden from his colleagues and adoptive family, including his foster sister Deb, while being romantically involved with Rita Bennet. His primary relationships evolve around his adoptive father Harry Morgan's teachings, which form the framework of his 'code', dictating who he can kill and when.