Dexter (episode)
Dexter is contacted by his foster sister Debra (Jennifer Carpenter), a vice officer in the Miami Metro Police Department. Dexter, a blood spatter analyst for the department, assists Debra in investigating an apparent serial killer targeting prostitutes. Dexter examines the latest victim and is shocked to find no trace of blood on the dismembered corpse. At the police station, Dexter discusses another murder case being handled by James Doakes (Erik King), a detective who dislikes him. Later, Dexter watches Jamie Jaworski, a murderer who escaped justice due to a faulty warrant, and breaks into his home to find evidence. Once he confirms that Jaworski is guilty, Dexter meets with his girlfriend Rita Bennett (Julie Benz), a former victim of domestic abuse victim; Rita has two young children, Astor and Cody. While on a date with Rita, Dexter finds another murder scene with no traces of blood, this time with the victim's head missing. Dexter theorizes that the killer murders his victims in extreme cold, explaining the absence of blood, and might be using a stolen refrigerated truck. Dexter allows Debra to pitch the theory, but their superior officer, Lt. María LaGuerta (Lauren Vélez), dismisses it.
List of Dexter characters
Her mentally scarring experience has left her with a desire for vengeance, and she attempts to enlist Dexter's help to hunt down and kill the remaining perpetrators. He is willing to do this for her, but suggests that she gets on with her life and leave Miami. Upon returning to her motel room, Dexter discovers that she has been attempting to track down the group of people who raped and tortured her, and has gone to kill a sex offender who Dexter, having hunted him down earlier, knows to have been wearing a tracking anklet. This revelation leads Lumen to realize she does not possess the skills or experience to discover the identities of the men who tortured and raped her and kill them. However, finding herself unable to leave Miami, she shoots a man she suspects of being one of her abusers, due to recognizing his distinctive smell. 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. Protesting innocence at first, the victim calls his co-conspirators on Lumen's cell phone, confirming her suspicion and prompting Dexter to kill him. They later meet at Dexter's house, where Lumen reveals that his death brought her a sense of peace, stating that the only way she will be able to find that peace again is to kill all of her other abusers. Dexter recognizes this as being her own "dark passenger", and agrees to help her.