Captain Planet and the Planeteers - Season 2 - Eps 10: An Inside Job
Sludge and four of the Planeteers learn first hand the terrible effects of untreated sewage when MAL and Dr. Blight shrink the EcoSub (and them) to microscopic size and put them into polluted water that Kwame unwittingly drinks. The Planeteers must battle hideous water-borne parasites in Kwame's body so that he can recover, and restore them to proper size.
About Captain Planet and the Planeteers

Title: Captain Planet and the Planeteers
First Air Date: 1990-09-15
Last Air Date: 1996-05-11
Status: Ended
Rating: 6.763/10 (from 217 votes)
Language: EN
Seasons: 7
Total Episodes: 113
Network: TBS Syndication
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy, Kids
Production Companies: Turner Program Services, DiC Entertainment, Hanna-Barbera Productions, TBS Productions
Synopsis
Eco-villains beware: Captain Planet is here to save the day! With the guidance of Gaia, five Planeteers - representing Earth, Fire, Water, Wind and Heart - come together to defend our planet from environmental destruction. With their powers combined, the team becomes the solution to pollution!
Cast

Joey Dedio
Wheeler (voice)

LeVar Burton
Kwame (voice)

Kath Soucie
Linka (voice)

Scott Menville
Ma-Ti (voice)

Janice Kawaye
Gi (voice)

David Coburn
Captain Planet (voice)