Captain Planet Season 4 Episode 18 - Planeteers Under Glass Episode Title:Planeteers Under Glass.Episode Description:A scientist constructed a simulation of a condensed version of Earth, featuring different biodomes. It was an experiment to demonstrate the consequences of pollution and how it will destroy the world, simulating a few centuries in ninety minutes. The Planeteers are visiting the land containing mutated animals with the scientist and plan to leave after 30 minutes, but Dr. Blight locks them in. The Planeteers cannot use their rings individually because the simulated world has an effect on them, but they can combine them to summon Captain Planet. However Captain Planet cannot survive long in the world due to the intense pollution. The Planeteers and the scientist must find a way out, before it is too late.