Quick recap
Dexter tries to explain the church scene to Debra, but she finds the blood slides in his apartment, and he confesses. She tries to change her brother, then to control him. Isaak Sirko, a Ukrainian mob boss, comes to Miami after whoever killed his associate. Dexter falls for Hannah McKay, a widow who poisons people in her way. LaGuerta reopens the Bay Harbor Butcher case and even arrests Dexter, who plants evidence to turn the tables. In the end, Dexter sets a trap to kill LaGuerta. Debra arrives to find the captain unconscious. LaGuerta comes to and begs her to shoot her brother, and Debra shoots LaGuerta.
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