Dexter DVD world was shattered with Ritas death and it takes a while for things to get back to some kind of normality. Michael C. Hall is as usual brilliant as Dexter, his anguish and sense of desolation is brilliantly conveyed in episode 1 of season 5 and The Vampire Diaries DVD he shows a very "human" reaction to a creep in a boat shed, I will not reveal anything else but to me its a pivotal moment for Dexter. Dexter, with his tangled ideals of justice and self-preservation, would think that the right thing to teach a victim would not so much be revenge.