Dr. Simon Dunne is a forensic pathologist in the same department as Annie. Simon works more in the computing side of pathology, analyzing evidence and collating it to create patterns to identify a suspect or suspects. Simon finds himself attracted to Annie, and after a little help from Stone, manages to hit it off with her after taking her on a date. Stone and Simon begin to form a bond, and Simon regularly fast-tracks evidence and results in order to aid Stone's investigations and put him in Turner's good books.