DEXTER MORGAN (Michael C. Hall)
He'll charm fellow officers with a doughnut, wile away a Sunday with his wife Rita and the kids, or chop up a victim and package their body parts in plastic bags. Hiding beneath the mundane exterior and contrived facade of Dexter, a charming blood spatter expert for the Miami police, is an obsession with meting his own twisted brand of justice: stalking and murdering the guilty.
DEBRA MORGAN (Jeniffer Carpenter)
As Dexter puts it about his cop sister: "If I could have feelings at all, I'd have them for Deb." Despite recent success at work, her complicated love life continues to trip her up. Debra looks up to Dexter — but also senses there is more to him than meets the eye.
HARRY MORGAN (James Remar)
Harry Morgan, Dexter's adoptive father and a former homicide detective, was first to spot Dexter's passion for human vivisection and helped his son channel his homicidal impulses into a more constructive pursuit: vigilante justice.
RITA BENNET (Julie Benz)
After surviving a violent ex-husband and harboring the mental scars to prove it, Rita has finally found true happiness for herself and family with Dexter, the perfect spouse and father to her new baby. But for how long can she "live the dream" with Dexter in ignorant suburban bliss?
JOEY QUINN (Desmond Harrington)
Although this fellow homicide detective has always shown a fondness for Debra, his recent frustration with the Morgan clan continues to grow — thanks to some ill-timed and sloppy casework from new dad Dexter.
VINCENT MASUKA (C.S.Lee)
Always quick with an inappropriate remark, Masuka is the wisecracking forensic expert who assists Dexter in crime scene investigations.
LT. MARIA LAGUAERTA (Lauren Velez)
The Miami homicide division's boss and resident dictator. She's given more of her attention recently to internal affairs... with a department colleague.
ANGEL BATISTA (David Zayas)
A fellow homicide detective, Batista works closely with Dexter on forensics cases. While he may not share Dexter's blood lust, he definitely appreciates the art of killing.
SGT. JAMES DOAKES
Dexter's nemesis at work
A former covert operations solider, Doakes is a bit of a loose cannon who isn't close to anyone. Doakes strongly believes that Dexter is hiding something and regularly gives him a hard time. At the end of Season 1 his suspicions are further aroused when he sees a connection between Dexter and the Ice Truck Serial Killer (Brian Moser, Dexter's biological brother). Doakes begins to investigate Dexter's past and, unsatisfied with what he finds, goes to extreme lengths to find out more about him. Dexter finds this annoying and wants Doakes to get off his back, but Doakes' obsession gets more out of control and more dangerous for both of them in Season 2. As a result, Dexter is forced to take matters into his own hands.
Brian Moser AKA Rudy Cooper
Dexter's biological brother and the Ice Truck Killer
Since witnessing their mother being killed when a cocaine bust went bad, both went their separate ways at the crime scene and both brothers developed into serial killers. Dexter was adopted by Harry Morgan while older brother Brian was considered too damaged and was left to a life of institutionalization in the system. Dexter had no memory of Brian's existence until Brian makes himself known at the end of Season 1. While Dexter pursues the Ice Truck Killer professionally, the killer is also pursuing him and, as Dexter puts it, "inviting him to play". Brian uses the alter-ego of Rudy Cooper to seduce Debra Morgan and get closer to Dexter. When he reveals his identity as both the Ice Truck Killer and brother to Dexter, he forces Dexter to choose between his blood brother and foster sister. Ultimately, Dexter chooses Debra, but it costs him a great deal to let his brother go.