Abby and Ty are contestants on the hottest game show that turns out to be a trap.

Abby is kidnapped and imprisoned in a hothouse full of giant, man eating plants.

Sloppy Joe and his new buddy made of snot attempt to suck up all the mucus in town.

Villain Darko Crevasse plunges the city into darkness.

Kid Rot's powers are out of control, making the forest rot.

Fartor and his new apprentice, Far-Ty join forces to drill into the planet core and turn the earth into one big gas planet. It is up to Abby to stop the gassy bad-guy…and re-convert Ty back to an oxygen-breathing, good-guy Grossologist.

Gassy super villain Fartor returns with a scheme to fart up the planet.

A giant mutated leech is leading his blood suckers to freedom.

Ty and Abby get stuck in school with Paige and Naomi when they miss the bus.

It's science competition time at Ringworm Jr. High, only this time there's a new challenger for Ty's crown.

After being hit by a green ray, Abby ages at an accelerated rate

Instectiva, Lance Boil and Sloppy Joe join forces to take down the Bureau of Grossology.

In a plot similar to Fantastic Voyage, Lance Boil has perfected his shrink ray, and invaded Ty's body. Lance hopes to decrease Ty's I.Q. to zero, and heads for the brain. It's up to Abby to go in, and beat him singlehandedly.

The new kid at school has a rotting touch and everything organic he touches immediately rots.

Ty and Lab Rat design and build a bigger, better "Tymobile."

The city's water system is attacked causing a puke-a-thon.

A giant owl terrorizes the people, especially the pigeons.

A crazed basketball player creates a plague using his new brand of running shoes.

Mutant hagfish attack the town.

Insectiva creates a strain of head lice that grow on all the kids' heads at Ringworm High.

Lance Boil builds a ray gun.

Insectiva tries to employ giant termites to destroy the city.