He initially considered his relationship with Rita to be part of his disguise; however, by the end of the Season 4, Dexter had fully evolved into a family man and wished to rid himself of his self-titled "Dark Passenger".
A year later when Juan Ryness, a pimp murdering prostitutes, was released due to a faulty search warrant, Harry lost his temper and told Dexter he was right in training him.
His prostitute-hiring tendencies leads to a call girl dead from a heroin overdose which, while not his fault, led to LaGuerta attempting to cover up the no-fault crime scene, claiming the low clearance rate as unacceptable.
Approximately 10 years after the original series' finale, Dexter has moved to the fictional small town of Iron Lake, New York, posing as Jim Lindsay, a local shopkeeper.
He "falls off the wagon", however, when he impulsively murders Matt Caldwell (Steve M. Roberts), an arrogant stockbroker who once killed five people and got away with it thanks to his family's wealth and political clout.
Unbeknownst to Dexter, Kurt is a serial killer who preys on runaway teenage girls, and is trying to get the search called off so the police won't find his victims' bodies.
[5] Over Debra's objections, Dexter once again becomes a father to the boy, who quickly becomes a popular student and star of his school's wrestling team, and befriends Angela's adopted daughter, Audrey (Johnny Sequoyah).
Dexter searches Harrison's room and finds a bloody straight razor - the same kind of blade that Arthur Mitchell used to kill Rita - and realizes that his son has inherited his homicidal tendencies.
[9] During a chance meeting with Angel Batista (now Captain of Miami Metro) at a police conference in New York City, Angela learns about Dexter Morgan's supposed death, and after some investigation discovers the true identity of "Jim Lindsay".
Meanwhile, true crime podcaster Molly Park (Jamie Chung) arrives in town to do a story about the missing runaways in Iron Lake, and Dexter discovers that she did a series on the Bay Harbor Butcher.
[10] When Angela finds the mummified corpse of her friend Iris, who disappeared 25 years earlier, she asks Dexter to analyze the remains, and tells him that she suspects Kurt of killing her.
Harrison leaves Iron Lake, and reads the goodbye letter Dexter wrote to Hannah 10 years earlier, telling her to "let me die so my son can live".
Brian suffered severe psychological trauma due to the experiences in the container and was left in a mental institution, where over time he became a violent psychopath, resulting in him also becoming a brutal murderer, even more dangerous than Dexter himself.
When Laura was exposed and murdered for being involved with the police in their attempts to bring a drug cartel to justice, Joe went underground and resettled in Dade City, Florida working as an insurance adjuster.
Pascal remains Lieutenant of the department well over a month after the end of the case, earning the trust of the police officers and friendship of LaGuerta, but soon begins to crack under pressure when she starts to experience personal problems with her fiancé Bertrand (portrayed by Kiko Ellsworth).
Lila, following Dexter and watching him on his boat with Rita, Astor, and Cody, breaks into his van, takes his GPS device and finds the address for Jimenez's cabin.
Miguel Prado was a senior Assistant District Attorney, infamous for his harsh enforcement of the law, making him powerful, influential and popular with the regular police and citizens of Miami, and the main antagonist of Season 3 along with George King.
To avoid a prison sentence, Ramón, largely disgraced in the eyes of his Miami Metro PD colleagues, unwillingly accepted the offer from the police union of early retirement with benefits, and so surrendered his gun and badge.
As Debra Morgan met with Freebo's old associates in an attempt to find him, Orozco trailed her, covertly watching their homes under the cover of trimming their trees, and eventually kidnapped each of them, tortured them for information and killed them, taking a patch of skin from each victim, for which he was dubbed "the Skinner".
His wife, fearing her husband, perpetually puts on a cheery façade and is willing to let her daughter continue a perceived affair with Dexter as long as Arthur remains unaware.
Unable to accept the reality of her husband being a veteran serial killer, Sally begins blaming her children for the loss of their lives, hoping Arthur returns to "whisk her away".
Though at first they seem to have a great father/son relationship, it is soon revealed that his father is very domineering to him and physically abusive, going as far as to break his fingers for damaging Arthur's car (a white 1968 GT-500 Shelby Mustang convertible with a blue racing stripe).
When the man escapes after being shot once in the leg, Lumen calls Dexter, who helps track down the wounded criminal, albeit reluctantly, and cautions her about killing the wrong person.
Lumen turns up at the crime scene where Boyd's stocked and preserved bodies have been discovered following a traffic crash, where she is spotted by Quinn, who asks Liddy to investigate her connection to Dexter.
When Dexter and Lumen start tracking down the members of a secret circle of men responsible for the rape, torture and murder of several young women, they come to suspect that Chase is a part of it.
He then drives her to an abandoned summer camp he owns outside of town (under the name Eugene Greer, presumably to avoid suspicion), which is the location each of the gang's victims (including Lumen) had been raped and tortured.
Stanley "Stan" Liddy was a corrupt narcotics cop, under investigation by Internals Affairs detective Jim McCord, with help from LaGuerta and the main antagonist of Season 5 along with Jordan Chase.
Brother Samuel "Sam" Wright is a born again Christian and a reformed criminal who runs an auto-body shop in Miami where he tries to extend his good luck to other ex-convicts by giving them a place to work.
Professor James Gellar is a former religious studies teacher at the University of Tallahassee, erroneously fired for stealing an ancient Roman sword which belonged to John the Revelator.
At this time, Jurg assisted Isaak in the kidnapping of Hannah McKay, in order to assure the cooperation of Dexter Morgan in killing Oleg Mickic and Benjamin Caffrey.