- Rita forces Dexter into going to a 12 Step programme
- He is reluctant until he meets his new sponsor, Lila
- The other addicts understand about his 'dark passenger'
- Doakes finds out about the meetings and it looks like he will be getting off of Dexter's back
- Dexter investigates a car salesman who's been killing single women
- He buys a minivan from him and then kills him
- Deb is put on the Butcher's task force; Dexter is not
- Deb tries to get out of it, but Lundy convinces her to stick with it as she might have unique insight into the whole serial killer thing
- Deb spots the criminal connection with the Butcher's victims
- Pasquale is still investigating her fiance; the captain asks Maria if Pasquale is fit for the job and Maria defends her