Now realizing the error he has made, Dexter redoubles his efforts to track down the doomsday killer and eliminate him. He plants evidence in the church to keep the police off the scent and sets out to find DDK. He manages to track down Holly, the woman Travis freed, but too late. From the evidence at the crime scene, Dexter believes he knows what DDK will strike with next, though he has no idea where. With Quinn hung over and not at work, Batista sets off to interview a person of interest which may have major ramifications for him. Meanwhile, Deb goes through the evidence from the dead call girl case and now knows who was with her and who Laguerta is protecting. Louis the crime lab intern is more than a little deflated when Dexter slams his new computer game.
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
Travis teams up with a religious and fanatic couple, named Adam and Beth Dorsey, whom he met via Gellar's blog, to kill Holly Benson (the former Whore of Babylon whom he let go) and to unleash the next tableau, Wormwood, a poison which Travis re-imagines as poison gas. Dexter tries to get one step ahead of the Doomsday Killers and figure out where their next victim could possibly be before they attack again. Meanwhile, Debra begins to realize she relies too much on her brother after reacting to a crime scene.