Original Air Date—6 December 2009
Dexter is determined to take care of the Trinity Killer/Arthur Mitchell himself, at least in part to atone for the mistake he made. When Dexter learns that Christine Hill is in custody, he realizes that the police will soon be onto Arthur, so he sets up an elaborate ruse to send them down the wrong path. It all backfires and ends in another death. Arthur also learns his real name and the work he does. Meanwhile, Rita finally tells Dexter about the kiss at Thanksgiving, but isn't quite sure what to make of his nonplussed reaction. Also, Laguerta and Batista are caught kissing on a store surveillance video and Captain Matthews is set on having them both fired. They decide there's only one way to get out of he mess they've created for themselves.
