As the search continues for the source of the deadly prions, NorBAC zeros in on a large agribusiness they suspect of selling infected chickens. David tries to convince Danny to stop gene therapy. Caroline insists that David interview Jill for the vacated virologist position at NorBAC. His reluctance turns to lust when he meets her.

Carlos Serrano, the Senior Researcher at NorBAC, wants to help a friend dying of AIDS participate in cutting edge research. He convinces David to help supply a Houston lab with contraband stem cells so his friend can be the first guinea pig for this radical gene therapy. When another child dies of Leukemia, David is determined to find out why the cancer treatment isn't working.