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.

It's twenty years in the future, and the Eco-villains are older, but certainly none the wiser. What's worse, they're all running for president, and they've kidnapped the future Planeteers so nothing can be done about it! Will anyone be able to stop the Eco-villains from turning the White House into the Blight House?!?

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.

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.

The Planeteers are climbing Mount Everest in the Himalayas when they follow a snow leopard and fall into a cavern where they encounter a Yetti among 12 extinct or endangered animals, all of whom can speak, and begin to judge not only the Planeteers, but the entire human race. They go back from the Ice Age and various other time periods where the animals were either hunted or had their habitats destroyed by humans resulting in their extinction or becoming endangered. This episode is used to educate both of the past, present, and future for the viewers it explains how we can have everything one day and lose everything later.

Engines are revving up for a giant speedboat race through the Florida waterways. Unfortunately, the race threatens the endangered manatees who live in these backwaters. As usual, the Planeteers try putting to stop the eco-catastrophe. Only, this time they get some unlikely help from Wheeler's favorite TV stars, Danny Dazzleduff and Belinda Bubblebutt from Babe Watch, when they discover that Hoggish Greedly is behind a plan to get rid of the manatees.

While visiting India to do research on pollution in the sacred Ganges River, the Planeteers and thousands of others come down with a mysterious illness. Only Wheeler, who has been off exploring the city on his own, is not sick. However, when he starts receiving mystical visions from the Hindu gods, Hanuman and Ganesha, his newfound friend Lita wonders how well he really is.

The Planeteers head South to meet their pal Milton who plans to show them all he's doing to preserve the endangered Mississippi River. But Ma-ti doesn't want a guided tour. He has delusions of experiencing the Mississippi like Huck Finn and Tom Sawyer did in the old days.

The Planeteers discover Dr. Blight has been experimenting with puppies at a dog pound she's secretly running. Unsuspecting people, including Wheeler's young cousin are adopting unhealthy dogs and it's up to Captain Planet and the Planeteers to put a stop to Blight.

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...

When Captain Planet & the Planeteers save a ship from a storm, Senor Cisnernos offers the Planeteers a free vacation at his South American hotel. One of the employees mistakes Ma-Ti as a local riff-raff. But Ma-Ti decides to take a walk away from the good life. When a gang destroys a local restaurant, Captain Planet arrives & puts out the fire riding a surfboard!

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.

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..

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.

Using her latest time travel device, Dr. Blight returns from 20 years in the future back to the present to warn HERSELF that the world has become... peaceloving! In a last ditch attempt to restart the Cold War, the two Blights hijack a load of plutonium from dismantled warheads and escape back into the past to sell nuclear bombs to the highest bidder.

Linka and Ma-Ti visit a friend, Juan, in Central America. While there, Juan's parrot, El Profesor, leads them to a secluded "bird paradise" when suddenly, a giant, metallic bird appears. All the birds, including El Profesor, follow it and so do Linka and Ma-Ti. They soon find themselves locked in a huge aviary, courtesy of Hoggish Greedly, who's running an exotic bird smuggling venture. El Profesor escapes and leads the Planeteers back to the aviary, where they summon Captain Planet, who closes down Greedly's "fly-by-night" operation.

Gi, while repairing the Eco-Sub, became irritated with Suchi's presence, and ignored his warning to install the new part to the sub's turbines. Now, they have no control over it's direction. This causes problems when they go after Sly Sludge, who is dumping toxic waste into an Asian sea. The waste causes mutations in the sea life, especially a squid, which grows large in size, and begins to attack people, and later a nearby city. The Planeteers must stop Sludge's illegal sea dumping, and rescue the city from the mutated creature.

To prove to Duke Nukem that the human race will self-destruct; Verminous Skumm steals and plants nuclear devices in war-torn areas across the globe. He then plays a little war gaming and gives triggers to the warring factions in those areas. With a potential Armageddon on their hands the Planeteers race to make the opposing sides in each location see peace before they act on war.

Hoggish has set up a new commercial fishing business in the amazon, but when discovers that a group of local river Dolphins are literatly eating into his fishing profits, he schemes to eliminate the problem. Upon being breifed by Gaia, the Planeteers quickly race to make sure the amazon rivers are not made ""Dolphin-Safe"" simply for the sake of progress..

Responding to a court order, the Planeteers have only days to collect evidence which proves that Looten Plunder is illegally clearcutting one of our last old growth forests.

A fishing village is taught a lesson about the coral reef when Hoggish Greedly shows up. He uses dynamite fishing as a cover to rip off the coral reef remains with his new Reef Ripper. The villagers don't see this, as they are now being well fed by a plentiful, but quickly disappearing fish supply. When shown the devastating effects of pounding waves against a neighboring island village, the villagers ask the Planeteers to help stop Greedly. Captain Planet finds a creative way to recycle, and help start a new reef....

The Planeteers are present for the testing of JASON, a robot that observes wildlife and the environment, and transmits the data to its home base. The tests are being done on the Galapagos Islands, which is where Hoggish Greedly, Verminous Skumm and his rats have crash landed, since their ship was thrown off course from a storm. Now, they're hungry, and consider feasting on tortoise eggs to fill their appetites. The Planeteers must fly to the Galapagos to save the eggs, and remove the rats from the environment to restore the balance of its ecosystem.

The Planeteers are shocked to see a mother whale killed during a whaling expedition engineered by Blight and Plunder. They are even more shocked to learn that it's legal, thanks to a loophole in the international laws that allow whaling for "research." They set out to prove that Blight's research for a "whale repellent" is bogus and are helped by a young Japanese teenager who is trying to dissuade his whaler father from working for the villains.

Verminous Skumm brainwashes a high school into thinking that AIDS is contagious & dangerous. The Planeteers help out a star basketball player who is accused of having the disease. Captain Planet makes a speech to the crowd about AIDS awareness.