The storyline involves many colorful characters. Jim (voiced by TenNapel) was at first an ordinary earthworm who did very earthworm-like things such as flee from crows and eat dirt. One day, in the space above Earth, the evil Psy-Crow had cornered a rebel spaceship pilot who had stolen an "Ultra-high-tech-indestructible-super-space-cyber-suit" built by Professor Monkey-for-a-Head. The suit had been commissioned by the evil Queen Pulsating, Bloated, Festering, Sweaty, Pus-filled, Malformed, Slug-for-a-Butt so that she could further conquer the galaxy. In the ensuing space fight, the suit was dropped to Earth, and fell on Jim. By a stroke of luck, Jim managed to land within the collar of the suit, and it ended up mutating him into the large and intelligent (at least by earthworm standards) superhero he is today.
- Earthworm Jim Season 2 Episode 10 - For Whom the Jingle Bell Tolls
- Earthworm Jim Season 2 Episode 9 - The Wizard of Ooze
- Earthworm Jim Season 2 Episode 8 - Lounge Days Journey Into Night
- Earthworm Jim Season 2 Episode 7 - Peanut of the Apes
- Earthworm Jim Season 2 Episode 6 - Hyper Psy-Crow
- Earthworm Jim Season 2 Episode 5 - Evil in Love
- Earthworm Jim Season 2 Episode 4 - The Exile of Lucy
- Earthworm Jim Season 2 Episode 3 - Darwins Nightmare
- Earthworm Jim Season 2 Episode 2 - Opposites Attack!
- Earthworm Jim Season 2 Episode 1 - The Origin of Peter Puppy
- Earthworm Jim Episode 13 - The Anti-Fish
- Earthworm Jim Episode 12 - Queen Whats Her Name
- Earthworm Jim Episode 11 - Bring Me the Head of Earthworm Jim
- Earthworm Jim Episode 10 - The Great Secret of the Universe
- Earthworm Jim Episode 9 - Trout!
- Earthworm Jim Episode 8 - The Egg Beater
- Earthworm Jim Episode 7 - Sword of Righteousness
- Earthworm Jim Episode 6 - Upholstered Peril
- Earthworm Jim Episode 5 - Conqueror Worm
- Earthworm Jim Episode 4 - Day of the Fish
- Earthworm Jim Episode 3 - Assault and Battery
- Earthworm Jim Episode 2 - The Book of Doom
- Earthworm Jim Episode 1 - Sidekicked