Part 5/7:
A frantic race against time ensues, exploring the spa's dark backroom secrets, where Dean struggles with drugged pudding and Sam plays the role of a yoga instructor to gather intel. They eventually find Sheriff Donna, who, under the influences of their dubious treatments, reveals she too has experienced fat loss accompanied by strange suction marks.
As the pieces fall into place, the sinister operation's owner, Maritza, and her disturbed brother Alonso are revealed to be behind the killings. Maritza, a pish Taco (fat-sucking creature from Peru), tries to rationalize their actions, asserting that she simply provides a service for weight loss, despite the obvious ethical implications.