Captain Planet Season 2 Episode 21 - Summit to Save Earth, Part One Episode Title:Summit to Save Earth, Part One.Episode Description:At the Earth Summit in Rio de Janeiro, the Planeteers are impressed by the proposed ecology measures, until the world leaders suddenly reverse their positions – victims of Zarm's treachery, who has united Hoggish Greedly, Looten Plunder, Sly Sludge, Duke Nukem, Verminous Skumm, and Dr. Blight under his leadership. He then tricks the Planeteers into giving up their rings and zaps Gaia into human form, aging her and destroying the planet simultaneously. The Planeteers' only hope is to find Commander Clash.