Episode 1 - Queen for a Day

Insectiva tries to destroy the city using giant, mutated termites.

Episode 2 - Episode 2

Episode 3 - Episode 3

Episode 4 - Episode 4

Episode 5 - Episode 5

Episode 6 - Episode 6

Episode 7 - Episode 7

Episode 8 - Episode 8

Episode 9 - Episode 9

Episode 10 - Episode 10

Episode 11 - Yack Attack

An attack on the city's water system makes people sick.

Episode 12 - The Greatest Race Ever Crawled

Ty and Lab Rat design a vehicle that crawls and leaps like an insect, and then are challenged to a race by Insectiva.

Episode 13 - Kid Rot

A boy causes organic things to rot just by touching them, so Abby and Ty try to cure him.

Episode 14 - The Insider

Lance Boil shrinks himself and tricks Ty into drinking him so he can tinker with Ty's brain once inside his body.

Episode 15 - All Together Now

Instectiva, Lance Boil and Sloppy Joe inflict the members of the Bureau of Grossology with parasites, halitosis and acne in an effort to take over the city.

Episode 16 - Oldie but a Goodie

While defusing a device Lance Boil planted in town, Abby gets hit by a ray that instantly starts aging her at 6000 times the normal rate.

Episode 17 - Episode 17

Episode 18 - School's Grossed Out for Summer

A mad proctologist, Dr. Colon, breeds a giant intestine that he intends to snake around the world, unless Ty, Abby, Paige and Naomi can stop him.

Episode 19 - Episode 19

Episode 20 - Episode 20

Episode 21 - Episode 21

Episode 22 - The King of Rottingham Forest

Episode 23 - Lights Out

Episode 24 - Frankenbooger

Sloppy Joe creates a friend out of stolen boogers.

Episode 25 - A New Leaf

Abby is kidnapped and placed in a greenhouse filled with man-eating plants.

Episode 26 - Heave It or Leave It