Dexter Morgan, a forensics expert who leads a secret life as a killer of unconvicted criminals, is impressed by the work of a new serial killer.
After targeting a man soon to be acquitted of murder, Dexter learns that the Ice Truck Killer knows about his double life.
When the body of another Ice Truck Killer victim turns up at a hockey rink, Lt. LaGuerta has the department focused on capturing a security guard.
Body parts from the Ice Truck Killer's latest victim begin appearing all over Miami in locations Dexter realizes are related to his own childhood.
The police department catches a big break in its investigation of the Ice Truck Killer when one victim is found alive.
When the body of one of Dexter's victims is returned to the original crime scene, he suspects the Ice Truck Killer is responsible.
The police think they've uncovered the identity of the Ice Truck Killer, but Dexter is not sure they're right.
Several wealthy women have apparently died of suicide, but Dexter suspects they were really murdered by their psychologist.
Dexter travels to the house of his recently deceased biological father to rekindle forgotten memories.
When Dexter is sent to investigate a bloody crime scene, deeply suppressed memories from his childhood begin to resurface.
Just days before Christmas, the Ice Truck Killer leaves the body of a dead sex worker outside Santa's Cottage.
While avoiding the misguided Sgt. Doakes, Dexter searches for the real Ice Truck Killer and his hostage before it's too late.
As a cool forensics expert with killer instincts, Dexter's got it made — but he may be getting more recognition than he ever hoped for.
A still-shaken Dexter continues stalking the monstrous Little Chino, while Debra struggles in her recovery.
Dexter's mysterious late-night activities attract the wrong kind of attention from Rita, who's convinced his vice of choice must be drugs.
To appease Rita, Dex gets a drug sponsor — who proves too attractive for her comfort. Meanwhile, he tries shaking off the tenacious Lundy.
Dexter isn't an easy man to shock, but he gets the surprise of his life when he learns his mother's murderer is alive and in Florida.
Inspired by the work of the Bay Harbor Butcher, a copycat vigilante has started dishing out his brand of harsh justice, and Dexter isn't happy.
Dexter comes up with a near-perfect strategy to throw Lundy off track by concocting a rambling Bay Harbor Butcher manifesto.
Lila's growing attachment is enough to put Dexter off the recovery process, and he decides it's time to again confront the man who killed his mother.
Lila's fatal attraction for Dexter is about to boil over, but he already has his hands full trying to stay ahead of his sister and Lundy.
Dexter turns the tables on Doakes, but the triumph is short-lived when the sergeant reveals a secret that shakes his foundation.
Dexter faces a dilemma with Doakes, who has information that could tear his world apart but who doesn't fit the profile of his usual victims.
Just as Dexter resolves one major problem in his life, another threatens to spiral out of control when Lila refuses to move on.
Dexter's life seems to be back on track — until he targets a drug dealer who is also in the sights of Assistant DA Miguel Prado.
Every cop in Miami is tasked with finding the fugitive Freebo, who is accused of killing the assistant DA's younger brother.
Dexter questions his Code when he encounters a man who sexually abuses children. When a murder is pinned on Freebo, Dexter knows the truth.
Dexter scrambles to convince Rita that his marriage proposal is sincere and romantic.
Dexter hears the story of a husband who has gotten away with murdering two wives for financial gain and tracks the man to Bimini.
Dexter tests Miguel to determine if his friend has discovered his secret, while Rita loses her job.
Dexter begins working with Miguel but they quickly have differences in selecting a potential new victim.
Dexter decides to teach the Code to Miguel but doesn't realize he's indulging his new partner's bloodthirst.
Dexter's distrust of Miguel strains their friendship. Rita resolves to confront Miguel about his suspected infidelity.
A series of chesslike moves ensues when Dexter and Miguel vie for the upper hand, with Miguel winning Rita's affection.
Dexter must find a way to get rid of Miguel despite the fact that his friend is a high-ranking DA (and Dexter's best man).
Dexter attempts to calm the emotionally unstable Ramon now that Miguel is out of the picture.
Now with a wife and kids in tow, America's favorite serial killer has more to lose than ever as he gets drawn into a deadly game.
While helping agent Lundy investigate new slayings he insists are Trinity's, Dexter realizes he's misplaced crucial evidence that could expose him.
Dexter is hampered by his neighborhood's increased vigilance, his temporary inability to drive and his admiration for the artful Trinity Killer.
With Rita and the kids away, Dexter begins stalking his next victim until he starts to empathize with his target: a cop who murdered her family.
Dexter is inspired to investigate the Trinity Killer on his own. Rita realizes how much she doesn't know about her husband after discovering a secret.
Dexter redoubles his efforts to stay ahead of the official Trinity investigation, and an unexpected source gives him relationship advice about Rita.
Dexter is finally comfortable with his life but is thwarted in his pursuit of a new victim. Debra has a renewed interest in their father's dark past.
Wondering if his father's Code is right, Dexter goes on a road trip with Trinity. Debra realizes her investigation has kept her from realizing the truth.
Dexter learns more about Arthur's twisted world. As Rita prepares a big Thanksgiving dinner, Debra uses the holiday to further investigate Trinity.
The disappearance of a 10-year-old boy forces Dexter to question his assumptions about Trinity. Masuka cannot face what he witnessed on Thanksgiving.
Dexter buys time as Debra's investigation is one step away from naming the Trinity Killer. Rita is disappointed after confiding in Dexter.
Dexter and Arthur are on a collision course, while Debra unearths a shocking, long-hidden truth. Rita admits her marriage is troubled.
In the aftermath of a traumatic incident, Dexter makes a choice that will affect everyone. Meanwhile, Quinn has his suspicions about Dexter.
Dexter tries to focus his energy on his kids and fight his dark urges, but a shocking discovery puts him on the trail of a new victim.
To create more free time to stalk and kill victims, Dexter hires a nanny. Debra is annoyed by her rookie partner.
Dexter finds himself in an odd situation when he has to save a life instead of taking one, and Debra has a scary confrontation with a murder suspect.
When Dexter is saddled with an unwanted conspirator, he has to make hard decisions about her fate. Meanwhile, Debra works the Santa Muerte case alone.
Dexter hunts a target but gets distracted and drawn into a precarious situation while helping his troubled new acquaintance.
While helping Lumen, Dexter finds himself on a collision course with the homicide team when he's called to investigate a horrifying crime scene.
Dexter and Lumen stalk a violent killer while attending a self-help seminar. Elsewhere, fallout from the Santa Muerte case lands Debra in trouble.
While hunting down their next victim, Dexter and Lumen are distracted by an unexpected guest's return.
Dexter finds a possible ally while pursuing Lumen's former captors. Meanwhile, Debra identifies two more suspects in the Barrel Girls case.
Dexter is forced to do damage control after conceding that someone outside of Miami Metro has taken an interest in him and Lumen.
Dexter realizes that he and Lumen are being lured into a trap and risks everything to escape. Quinn needs help that only Dexter can supply.
Homicide's investigation into a gruesome, faith-based murder causes Dexter to ask some spiritual questions and consider his son's legacy.
To solve a mysterious and macabre murder, Homicide brings in Brother Sam, a minister with a criminal past whom Dexter recognizes as a fellow killer.
Dexter is confronted with a sobering glimpse of his own potential future when a serial killer from his past makes a startling reappearance.
Much to his own surprise, Dexter leans on Brother Sam for support when Harrison has an emergency. Gellar and Travis leave a new tableau.
With the help of his newfound friend Brother Sam, Dexter wonders if there is light within him to counter the darkness.
Dexter is caught up in a very personal case that awakens the needs of his Dark Passenger.
Dexter finds himself teamed up with a fellow Dark Passenger when he takes a road trip to Nebraska to tie up some loose ends from the past.
Dexter uses lessons he learned from Brother Sam to follow up on some new leads in the Doomsday investigation.
Dexter receives help from an unexpected source while hunting the Doomsday Killers and staying one step ahead of Homicide.
Dexter tries to figure out the Doomsday Killers' next victim before it's too late; Debra has a strong reaction to a crime scene.
Dexter finds that in order to catch the Doomsday Killers, he must create a macabre tableau of his own.
Dexter and Homicide race against a lunar eclipse to catch the Doomsday Killers before their final gruesome act.
After Debra witnesses Dexter killing Travis Marshall, the brother and sister attempt to reconcile and cover up their involvement.
When a convicted killer claims he has information regarding a 15-year-old crime spree, Miami Metro sets out to unearth new evidence on the case.
Dexter tries to bring Debra on board with his new target, while the Ukrainian mob seeks revenge for the killing of one of their own.
After capturing a deadly killer, things go awry for Miami Metro, sending Debra into a tailspin. Dexter enters a dangerous game of cat and mouse.
While trying to uncover why Louis was killed on his boat, Dexter must outmaneuver Isaak, who's after him — and Debra.
Dexter becomes more intrigued by Hannah. Debra gets to know a local crime writer who has dug up some possibly incriminating dirt on Hannah.
Things heat up as Dexter and Hannah grow closer. When Sal Price discovers the two are involved, he wants the exclusive story.
Dexter tries to keep Debra in the dark about his relationship with Hannah, but a surprise visit from Astor, Cody and Harrison derails his plans.
Dexter is preoccupied with Isaak still on the loose. An internal struggle within the Koshka Brotherhood could work to Dexter's advantage.
A surprise visit from Hannah's father puts Dexter on alert, and the Phantom Arsonist's crimes become more gruesome.
When Dexter learns that the man who ordered his mother's death has been released from prison, he plans for a kill that might end all kills.
As LaGuerta closes in on Dexter's secret, he struggles to protect himself, Debra and the life he's built.
Dexter is still managing life as a dad, brother and killer, as Miami Metro investigates the murder of a man who's had pieces of his brain removed.
Miami Metro continues hunting for the Brain Surgeon, while Dr. Vogel enlists Dexter's help. While on a case, Debra takes matters into her own hands.
Dexter continues his search for the Brain Surgeon. Dr. Vogel tries to prove to Dexter that he's a perfect specimen. Debra's guilt begins to creep up.
Dexter tracks down another potential killer from Dr. Vogel's list. Quinn celebrates passing the sergeant's exam by defending Debra's honor in a fight.
Dr. Vogel comes into contact with the Brain Surgeon, while Dexter and Debra try to keep her safe. Masuka finds out he has a daughter.
Dexter monitors a troubled young man. Dexter and Debra finally get back to normal, but they're surprised when someone from his past pays them a visit.
Dexter takes on a protégé and starts teaching him the Code.
Dexter tracks down Zach, concerned that he may have murdered an innocent person. Meanwhile, Dexter tries to help Hannah escape the country.
Dexter investigates a murder that hits close to home. Dr. Vogel gets the surprise of a lifetime when someone returns from her past.
With Dr. Vogel's help, Dexter tries to lure the Brain Surgeon into a trap so he can get him on his table. Dexter witnesses a murder.
Dexter is torn between fleeing the country or taking out the Brain Surgeon.
Dexter is faced with impossible odds as a brewing hurricane makes its way toward Miami.