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Captain Planet and the Planeteers, commonly referred to as simply Captain Planet, is an American animated environmentalist superhero television series created by Barbara Pyle and Ted Turner and developed by Pyle, Nicholas Boxer, Thom Beers, Andy Heyward, Robby London, Bob Forward, and Cassandra Schafausen. The series was produced by Turner Program Services and DIC Enterprises and broadcast on TBS and in syndication from September 15, 1990, to December 5, 1992.

A sequel series, The New Adventures of Captain Planet, was produced by Hanna-Barbera Cartoons, Inc., distributed by Turner Program Services and broadcast from September 11, 1993, to May 11, 1996. The series was later rerun on Kids' WB!, Cartoon Network and Boomerang. It is currently on the MeTV Toons schedule. The series is a form of edutainment that advocates for environmentalism and is known for having several famous actors voice the villains. It spawned a franchise consisting of eco-friendly toys, comic books, video games, and a public charity to further promote its work.

Each episode is followed by at least one "Planeteer Alert" clip, often connected to the plot, which discusses environmental-political and social-political issues and how the viewer can contribute and be part of "the solution" rather than "the pollution".

Gaia (voiced by Whoopi Goldberg in seasons 1–3, Margot Kidder in seasons 4–6) is the spirit of Earth, whose physical manifestation is that of a dark-skinned woman. She sends five magic rings to five chosen youths from around the world. Four of the rings have the power to control an element of nature (earth, fire, wind, and water), and one controls the element of Heart. Gaia claims to have been asleep throughout the 20th century and to have awakened to a more polluted world than when she was last awake; however, this is contradicted by a flashback episode set in the 1920s in which people receive guidance from her.

Duke Nukem (Captain Planet) has not been a contender in any CBUB matches.