The spirit of the Earth, Gaia, summons five teenagers to join her in battling ecological destruction and pollution. Their first fight is to keep Hoggish Greedly's oil rig from destroying a coastline.

The Planeteers have little time to track down a radioactive isotope that was released by two capsules from an old chemotherapy machine. But where there's radioactivity, there's Duke Nukem, and he's already got his hands on one of the capsules. Now the Planeteers must find the two little children that took the other capsule before Nukem does.

The Planeteers travel back in time of pursuit of Hoogish Gredly and Sly Sludge, who intend to purchase the Grand Canyon decades before it becomes a landmark and use it as a land-fill

The Planeteers are vacationing on a cruise, where they meet Trevor, a big game hunter. Linka, totally misunderstanding Trevor's reasoning for enjoying hunting, takes an immediate disliking to him. They soon discover that Greedly is running a bogus "hunting" business, where tamed animals are being used (and slaughtered) to allow his clients to enjoy the ultimate hunting experience. The Planeteers and Captain Planet are captured, but Trevor comes to the rescue and helps turn the tables on Greedly.

An African boy from the future uses a virtual reality game and opens a door to the past where Looten Plunder is behind gorillas being poachered. He helps the Planeteers. The Planeteers call Captain Planet when things get out of hand.

When visiting Skyrunner (from "Stardust"), the Planeteers come across a faulty irrigation project, engineered by Looten Plunder, who has manipulated the Tribe into allowing him to put the project into effect. Blinded by promises of riches, new jobs, and a good harvest, the Tribe must be convinced by the Planeteers that the project is more destructive than productive, before Plunder drains them of their water, and thier livelihood.

A man who owns a small french fry company, his son is under the influence of Hoggish Greedly and Rigger not to have is father turn the factory "eco" friendly. When some strange accidents occur, the planeteers think the son is behind them, since the son and the father never got along, but they soon learn it was Greedly.

A scientist invites the Planeteers to participate in a new eco-experiment, but they all soon fall victim to another scientist - Dr. Blight, who makes one minor change to the experiment - they can't get out!

Blight gains powers from the "Tree of Life" and threatens to use her new strength to destroy the redwood forest.

On vacation, Linka goes to Washington D.C. to visit her cousin and uncle. Unfortunately, trouble isn't too far behind, because Verminous Skumm has brainwashed her cousin into taking a new drug called Bliss, and now Skumm wants to have Linka under his power as well.

The Planeteers are given a tour of a new "Perfect World," a world with no pollution, clean farming and little potential for environmental backlash. All is created within a computer environment, but Dr. Blight and MAL infect this would-be "paradise" with a shot of viral pollution...

Skumm peddles a polluted drink that turns consumers into rodent zombies.

As key World leaders come together under one roof to discuss how to best prevent the growing spread of pollution and o-zone damage worldwide, Zarm returns to earth with a plot to snuff out the Planeteers. Calling a meeting of all the eco-warriors greatest foes, Zarm is able to tap into earth's energies and drain the earth itself of all it's resources. Only Gaia stands in his way, but Zarm has a final surprise to ensure she does not become a problem..

In a story laced with magic and mystery, Hoggish Greedly and Rigger head south for Mardi Gras where they disguise themselves as ancient voodoo gods and poach Louisiana black bears in the bayou.

The Planeteers fight off poachers to save an infant orangutan and it's mother.

Skumm and his rat pack threaten to destroy a city with acid rain.

The teens cross paths with Cold Warrior Commander Clash, but their true opponent is Captain Pollution, a creation of Blight's.

Commander Clash joins the Planeteers to stop the eco-villains and Captain Pollution.

A disgruntled Wheeler uses a time machine to travel to the past to stop himself from becoming a Planeteer.

Blight creates a mini greenhouse effect over Hope Island, threatening Gaia's life.

Dr. Blight, who is doing inhumane experiments for a makeup company, is troubled by the Planeteers and the makeup company's owner. Dr. Blight tries to use them as her guinea pigs.

The soft-hearted Planeteers have been collecting homeless animals from around the world, and when Gaia sends them on a trip to return the endangered species to the wild, they find that the animals' habitats are in severe danger. To Gaia's surprise, instead of releasing the animals, the Planeteers return to Hope Island with a Geocruiser so full that Noah would be proud.

As part of a traditional quest, one of Ma-ti's Native American friends ventures into the desert to tame a wild horse. Ma-ti, accompaning him, set out, only to be captured by Hoggish Greedly, who has illegally crossed onto Indian land to round up the wild horses for slaughter

Greedly and Rigger strip-mine Thailand for rubies.

An aggressive and sneaky Earth spirit named Zarm tricks the teens into disobeying Gaia, sparking a dangerous game that threatens to lead to nuclear war.