Ozzy Jr..Ozzy thinks he’s having a baby, but it turns out to be an infection from an intracellular listeria bacteria by returning villain Strepfinger. Ozzy and Drix must find a way to destroy the parasite growing within Ozzy before it spreads its infection to all of Hector. The parasite grows to monstrous proportions, before rampaging throughout the city infecting other cells along the way. It is eventually destroyed by the HPD when Drix finds out it cannot resist pastry products and tricks the bacteria into exiting Ozzy with a pie.