Q1: Did Dexter Morgan kill Hannah McKay?
A1: No. Dexter Morgan was living under a false identity in Iron Lake, New York, completely detached from his former life. He had no contact with Hannah and did not know she was sick or deceased until Harrison informed him.
Q2: Why did Harrison enter the foster care system if Hannah died in Argentina?
A2: Hannah and Harrison lived as undocumented expatriates in South America under assumed identities. When Hannah died, Harrison had no legal guardians, financial safety nets, or legitimate documents, forcing Argentine authorities to hand him over to social services, which eventually extradited him to the United States.
Q3: Could Hannah McKay return in Dexter: Resurrection?
A3: Because Hannah died canonically of an aggressive illness, she cannot return in the physical present. However, given the franchise's reliance on psychological manifestations, much like Harry Morgan and Debra Morgan appearing in Dexter's conscience, Hannah could theoretically reappear in Harrison's memories or visions.
