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.
Dexter (season 2)
Rita doubts Dexter's reliability and honesty after finding evidence that he set up her husband Paul to be returned to prison. After her husband dies in a prison fight, Rita confronts Dexter with her suspicions. He admits to setting up Paul but after claiming it was a spontaneous act, cannot explain why he happened to be carrying heroin. Rita incorrectly concludes that Dexter is, like Paul, a drug addict and that this explains his occasional absences and odd behavior. Dexter admits that he does indeed have an addition (without specifying what that addition is) and promises to seek help by joining Narcotics Anonymous. There, he meets Lila Tournay, who offers to be his sponsor. Sgt. James Doakes remains suspicious of Dexter's true motives, and constantly monitors Dexter's whereabouts.