Ozzy and Drix must battle a monstrous snow beast after Hector gets lost in the snow.
A sticky disease kidnaps one of Hector's stomach cells and plans to take it to the heart.
Hector's misuse of nose spray causes Drix's aunt to turn into a monster.
Maria's shady brother Ricardo comes to visit.
Hector discovers hair growing on his chin; testosterone gang ties up the mayor and wreaks havoc.
Ozzy and Drix must prevent a giant worm from destroying the city of Hector.
Ozzy and Drix must go under cover to restore Hector's memory.
Ozzy searches for a way back to the City of Hector.
Ozzy is transferred out of the City of Hector and into the body of Christine.
Ozzy and Drix enter Hector's recurring nightmare to help him face his fear.
When Hector refrains from eating candy, his bacteria cells form an army to raid the body's sugar reserves.
A mayoral candidate uses a secret formula to cause destructive growth spurts and make Spryman look bad.
Ozzy thinks he is going to have a baby.
Gangster Sal Monella (guest star Henry Winkler) kidnaps the mayor.
Hector experiments with cigarettes, unleashing a creature known as Nick O'Teen (guest star Tim Curry) into the city.
Ozzy, Drix and Maria attempt to stop an increase of gas in Hector's intestines from ruining his social plans.
Hector wakes up with a pimple on picture day. Guest voice: Danny Bonaduce.
Ozzy and Drix grow attached to a dog germ.
Ozzy and Drix venture onto Hector's scalp to combat lice.
Ozzy becomes jealous of a secret agent who has been injected into Hector to track down a germ known as "Strepfinger."
Ozzie accidentally produces a neural spasm causing Hector to kick the school bully.
A white blood cell and a cold pill enter a teenager's body via a mosquito bite, providing a microscopic tour.