Dexter and Lumen attend a self-help seminar in order to talk their latest victim this week. Elsewhere, Deb finds unexpected fallout from the Santa Muerte case, forcing Batista to make a tough decision.
A major car accident puts a major twist on Dexter's search for the men who brutalized Lumen. We meet the motivational speaker who inspired Boyd and start to learn the role he played in this gruesome affair.
We learn more about Julia Stiles' character on this episode. Dexter takes an unusual interest in the woman Boyd had been torturing. Elsewhere, Deb has a confrontation with a key suspect in the Santa Muerte murder cases.
I love Halloween. The one time of year when everyone wears a mask... not just me. People think it's fun to pretend you're a monster. Me, I spend my life pretending I'm not. Brother, friend, boyfriend - All part of my costume collection. Some people might call me a fraud. Let's see if it will fit. I prefer to think of myself as a master of disguise.