Alec hides his deadly reason for helping Max stop a rampaging Joshua, whose pattern of attacks could lead them right to Sandeman. Meanwhile, Lydecker makes a startling find while digging into Renfro's botched experiments at a demolition site.

Max tracks a deadly---and decapitated---Manticore nomlie as Halloween proves a prime time for the mutants to roam Seattle undetected. But as she and Joshua close in on the headless assassin, she almost loses her own head when it becomes clear that Logan and Asha have been spending a bit too much time together.