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 Hartman
Dexter arrives in Albert Square after finding a photograph and address for his mother, Ava's (Clare Perkins), family that she has recently been reunited with after being given up for adoption as a baby. Dexter meets his cousin, Abi Branning (Lorna Fitzgerald), and they quickly become friends, with Dexter being invited to a family dinner, though Abi and the rest of the family are unaware that Dexter is related to them until Ava arrives to take him home. Abi is angry with Dexter for lying and Ava is unhappy that Dexter has gone back to Walford. Later, Ava's car breaks down in Walford on her way to a job interview, so Dexter takes it to the local garage where he becomes friends with Abi's boyfriend, Jay Brown (Jamie Borthwick), and Phil Mitchell (Steve McFadden) offers him work so he can pay for the repairs. Dexter becomes friends with Lola Pearce (Danielle Harold) and is shocked to discover that she is a mother. Lola is disappointed by his reaction but they remain friends. However, Phil, who has custody of Lola's baby, Lexi Pearce, is unhappy about Lola and Dexter being friends and tells Lola to stop seeing him. When Bianca Butcher (Patsy Palmer) tells Ava that her son Liam Butcher (James Forde) is in a gang, Ava reveals that Dexter used to be in a gang, which turns out to be the same gang. Ava and Dexter give Bianca advice, but after the gang are arrested and released on bail, they trash Ava and Dexter's home. Dexter tells Ava they have to move away.