 Zach Hamilton is the son of an affluent Miami politician who is suspected of killing a woman.As a patient of Dr. Vogel, she suggests that Dexter teach Zach the "Code of Harry" to which Dexter is initially reluctant, but he realizes that Zach is just like him when he was younger.Zach ends up properly vetting, stalking, and killing a person who had killed before, making Dexter proud that the Code can be passed on — until Zach is killed by the Brain Surgeon.