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Dexter investigates Zach and confirms that he murdered Norma. Vogel wants to teach Harry's Code to Zach, but Dexter is skeptical. Deb helps her boss, Elway, prove his sister's boyfriend is being unfaithful. After being denied the sergeant's position, Quinn zealously investigates Zach. Dexter captures Zach, who only killed Norma to protect his mother's fragile mental state from his father's marital indiscretions; Zach's noble motives convince Dexter to teach Zach Harry's Code. Later, while eating dinner at Deb's, Debra and Dexter are drugged by Hannah McKay.
All Episodes - S08
EPS03
With Sussman's body arranged to look like a suicide, Miami Metro closes the Brain Surgeon case; however, the real Brain Surgeon leaves disturbing trophies on Vogel's door ...
EPS09
Investigating Zach's murder, Dexter finds DNA evidence and learns that the Brain Surgeon is Vogel's psychopathic son, who faked his own death years ago and changed his id ...