The Earth's Mightiest Hero

 is the eighth one-hour crossover special in a series of Star Teens: Power Hour specials that features characters from Captain Planet and the Planeteers.

Summary
The Star Teens come across Planeteers Kwame (from Africa), Wheeler (from North America), Linka (from Russia), Gi (from Asia), and Ma-Ti (from South America) whose magic rings contain five of the same powers used by Felicia, Inidra, Lisa, Sandra, and Sheila. Meanwhile, the Planeteers' enemies have caused a smog covering Orlando! Will the Star Teens, the Planeteers, and Captain Planet stop them?

Characters

 * Ella
 * Kevin/The White Knight
 * Inidra
 * Sandra
 * Felicia
 * Lisa
 * Tanya
 * Sheila
 * Bella
 * Veronica
 * Queen Vampira
 * Captain Planet
 * Kwame
 * Wheeler
 * Linka
 * Gi
 * Ma-Ti
 * Gaia
 * Suchi
 * MAL
 * Dr. Blight
 * Hoggish Greedly
 * Verminous Skumm

Voice Cast

 * Aimee Carrero - Tanya
 * Cree Summer - Queen Vampira
 * David Coburn - Captain Planet
 * David Kaufman - Wheeler
 * Frank Welker - Suchi
 * Grey Griffin - Sandra, Dr. Blight
 * Janice Kawaye - Gi
 * Jennifer Hale - Veronica
 * Kari Wahlgren - Ella
 * Kate Micucci - Inidra
 * Kath Soucie - Linka
 * Kimberly Brooks - Sheila
 * Maurice LaMarche - Verminous Skumm, Hoggish Greedly
 * Phil LaMarr - Kwame
 * Scott Menville - Ma-Ti
 * Susanne Blakeslee - Bella
 * Tara Strong - Felicia
 * Taylor Lautner - Kevin/The White Knight
 * Tim Curry - MAL
 * Vyvan Pham - Lisa
 * Whoopi Goldberg - Gaia

Trivia

 * Only David Coburn, Whoopi Goldberg, Kath Soucie, Frank Welker, Scott Menville, Janice Kawaye, and Maurice LaMarche reprise their roles from the original 1990-1993 syndicated run of "Captain Planet" in this episode. Phil LaMarr takes over the role of Kwame (originated by LeVar Burton) and David Kaufman (Danny Phantom's voice actor) takes over the role of Wheeler (originated by Joey Dedio). Grey Delisle Griffin replaces the late actor for Dr. Blight, Mary Kay Bergman (who committed suicide on November 1999). In fact, it's just like Grey having been doing Daphne since 2001's "Scooby-Doo & The Cyber Chase".
 * During the smog scene, Ella, Inidra, Sandra, Felicia, Lisa, Tanya, and Sheila protect their faces using their Star Teens face masks. The Planeteers wear the same respirators from the Captain Planet episode "The Fine Print".