: While hospitalized, Harry realizes his nurse, Nurse Mary , is an "Angel of Death" who has been killing patients with medication.
The procedural engine kicks in when a body is pulled from the Miami River Canal — a judge’s son, drained of blood, with a chess piece placed in his mouth. This is Original Sin’s first “Big Bad” inciting incident. Dexter, using rudimentary blood-spatter analysis (he invents the technique in this episode), notices the killer removed the blood post-mortem . “He’s not a monster,” Dexter whispers to Harry’s ghost. “He’s an artist.” Dexter.Original.Sin.S01E01.Dexter.Original.Sin.And.in.the
