The Castoreum Within The Pheromone Lie

The Fringe division tracks down a series of deaths of wives shortly after the passing of their respective husbands. Discovering traces of the husbands' DNA on the bodies of the wife, Walter Bishop (John Noble) suspects that the killer is using pheromones taken from the husband to get close to the wives, using the substances as a perfume. Further identifying castoreum within the pheromone mix, they identify the murderer as Anson Carr (Michael Massee), a former and disgruntled employee of a perfume company inflicted with a rare skin disease. They arrive at Carr's home to find another husband, already dead, in a dehydration chamber, and race to protect his wife, Dianna (Ona Grauer). When no attack comes at the wife, Olivia Dunham (Anna Torv) realizes