Dexter finds himself at the yacht where Travis and his accomplices were preparing the next tableau, "Wormwood". They quickly realize that Travis is planning a gas attack. Worried that Batista has not been seen since the previous day, Quinn sets off to find him. Travis meanwhile sends Beth Dorsey to Miami Metro homicide with a canister of deadly gas and orders her to meet with Lt. Morgan. Deb has dinner with Deputy Chief Matthews and discusses the case of the dead call girl. The next day Deb realizes that Laguerta is very adept at office politics.
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
Travis tasks Beth with unleashing Wormwood poison gas in the Miami Metro squad room, but she's stopped by Dexter, saving everyone's life. Debra has dinner with Chief Matthews where she confronts him about being implicated in the dead call girl case. When Matthews is forced to retire, she realizes that LaGuerta has been manipulating her throughout the case. Dexter stages a fake Doomsday Killer tableau in order to draw out Travis, but is captured himself and becomes a part in the final tableau, the "Lake of Fire". Debra's therapist prompts her to consider whether she may actually be in love with her adopted brother.