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.
Hector has a recurring nightmare.
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 (Henry Winkler) kidnaps the mayor.
Hector experiments with cigarettes and unleashes a creature known as Nick O'Teen (Tim Curry).
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.
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.