Dexter finds himself in a strange new world when he attempts to hire a nanny for Harrison so he can have time to continue to stalk and kill Boyd Fowler.
A mishap happened when Dexter finally gets his hands on Boyd Fowler. Nevertheless, Boyd Fowler ends up in Dexter's kill table in another improvised Kill Room, which ends with one complication, a woman saw him killing.
Meanwhile, Debra, who takes the lead on a bizarre double homicide, is displeased when Batista suggests bringing in an annoying rookie officer who has her own theories on the case. Things heat up for Dexter when Quinn notices strange similarities between Trinity Killer associate 'Kyle Butler' and Dexter Morgan.
- Michael C. Hall: Dexter Morgan
- Jennifer Carpenter: Det. Debra Morgan
- Desmond Harrington as Det. Joey Quinn
- C.S Lee as Vince Masuka
- Lauren Velez: Maria LaGuerta
- David Zayas: Angel Batista
- James Remar: Harry Morgan
- Julia Stiles as Lumen Ann Pierce
- Maria Doyle Kennedy as Sonya
- Shawn Hatosy as Boyd Fowler
- April L. Hernandez as Off. Cira Manzon
- Raphael Sbarge as Jim McCourt
- Vanessa Bell Calloway as Crisis Counseller
- Adam Harrington as Agent Walker
- Juan Carlos Cantu as Fauzi
- Kim Robillard as Dr. Lorre
- Evan George Kruntchev as Harrison Morgan (uncredited)
- Luke Andrew Kruntchev as Harrison Morgan (uncredited)