Last season on Dexter, our favorite serial killer was seen tying the knot with a pregnant Rita, as the two were about to embark on a new life together. This season, Dexter is living the dream as new dad, with a wife and a house in the 'burbs. But fatherhood isn't what Dexter expected it would be, as the lack of sleep really puts a damper on his vigilante-murder schedule. Meanwhile, a new/old serial killer is own the prowl: the Trinity Killer (John Lithgow), so named because he kills in groups of three.
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