By threatening Nadia's safety, George Novikov convinces a reluctant Quinn to destroy evidence against Isaak in a murder case. Nadia eventually flees Miami to get work in Las Vegas. Additional characters, introduced in season 8 Jacob Elway Sean Patrick Flanery Jacob Elway is a former police officer who now owns a large private investigation company. He hires Deb after she quits the police force, on her conditions that she be able to choose the cases she pursues. He later becomes involved in tracking down fugitive Hannah McKay, realizing that Dexter and Deb are helping to hide her. In the series' finale, he is the only living person apart from Hannah and Dexter, who knows that Dexter's son Harrison Morgan is alive and on the run with Hannah. Evelyn Vogel Charlotte Rampling Dr. Evelyn Vogel is a neuro-psychiatrist specializing in psychopaths. She offers the Miami Metro Police help in tracking a serial killer, the "Brain Surgeon," who removes parts of his victims' brains. She knows intricate details of Dexter's lifestyle, revealing to him that she has drawings he made as a child which hint at his psychopathy. She is the co-architect of the Code that Harry taught Dexter, and is quite pleased at the fact that it successfully has kept Dexter alive and well. Dr. Vogel enlists Dexter's help in catching the Brain Surgeon, who has targeted her by leaving pieces of victim's brain at Vogel's house. She also works with Debra when she shows signs of PTSD after María LaGuerta's murder, but is murdered by her estranged son. Zach Hamilton Sam Underwood 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. Daniel Vogel Darri Ingolfsson Daniel Vogel is Dr. Vogel's estranged psychopathic son and the main antagonist of the final season. She sent him to a mental institution after he killed his brother, and he eventually faked his death and came to Miami under the alias Oliver Saxon, living as a building inspector. He