Leo gives evidence at a custody hearing in the wake of a child's death,his opinion over-ruling that of Dr Helen Karamides,which annoys her former pupil Nikki,who sees Helen as the victim of the male establishment and cannot believe the accusation that Helen is retaining tissue samples from past cases. Nikki is also approached by Andy Farmer. His mother Annie was the appropriate adult at the interview with serial killer Arnold Mears,who now directs Annie to the sites of his victims' remains where she collects their bones. Andy wants Nikki to help identify them. Nikki also discovers that Helen had a professional involvement with Mears.