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Hannah McKay, portrayed by Yvonne Strahovski, is a complex and enigmatic character in the TV series "Dexter." She is a serial killer who initially appears as a love interest for Dexter Morgan, the show's protagonist. However, as their relationship progresses, Dexter discovers Hannah's true nature and must confront his own moral dilemmas. Strahovski's portrayal of Hannah McKay is nuanced and compelling, capturing the character's intelligence, vulnerability, and dangerous allure.