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Sly Sludge
Sly Sludge
Gender Male
Race Human
Status Alive
Powers Smog (temporarily in Mission to Save Earth Part I and Part II), none
First Appearance Volcano's Wrath
Voices Martin Sheen (Seasons 1-3)
Jim Cummings (Seasons 4-5)

Sly Sludge is usually found trying his way through some sort of get-rich-quick scheme, Sludge represents laziness, ignorance, the dangers of apathy and short-term thinking. As waste management is a real problem, he often gains credibility by claiming he has figured out a way to alleviate trash disposal problems, and makes a fast buck from places sending their garbage to him. One time, he claimed he had invented a shrink ray that transformed a heap of trash into a tiny bit. In actuality, Sludge dumped the trash heap into a volcano, which soon erupted with contaminated magma.

Typical of many Captain Planet villains, Sly Sludge would often team up with other villains, such as Dr. Blight, Verminous Skumm, or Hoggish Greedily. One time, he gained legal rights to dispose of toxic waste in US national parks; in actuality, Sly Sludge had been conspiring with Dr. Blight, whose computer, MAL, falsified Sludge's background to make him look like a committed environmentalist, at the same time making the Planeteers look like polluters.

In later episodes, Sly Sludge reforms and gives up his polluting ways. Upon realizing money can be made in recycling, he starts focusing his efforts on mass producing a means of efficient recycling.

Sly Sludge was first voiced by Martin Sheen. In later episodes, he is voiced by Jim Cummings.

Appearance and Operations[]

Sly Sludge is short and rotund, with patchy, black hair. He is either going bald, or it is a side-effect from the toxic chemicals he constantly deals with. His remaining hair is long and past his shoulders. He has shaggy black eyebrows.

Sludge often wears yellow rubber gloves with "no" symbols on them. His clothes are khaki, usually cover-alls or some sort of unofficial uniform, and he wears black boots.


Ooze: Ooze is skinny, with a strange voice that sounds strained and nervous. He is usually wearing a hard-hat. Ooze often wears blue jeans and a vest.

He is voiced by Cam Clarke.

Tank Flusher III: Tank Flusher III appears in the episode A Mine is a Terrible Thing to Waste Part I and Part II. He answers Sludge's ad for "A heinous henchman to serve a machiavellian master." Flusher admits he doesn't know what it means, but he says he's the man for the job.

He is tall and muscular, with a deep voice. He has blonde hair and has a gold front tooth. Flusher is obviously stupid, which suits Sludge fine, as Flusher obeys orders easily.

Significant Episodes[]




  • Regardless of doing so if only for financial greed, Sludge is one of two major villains to reform in the series - the other being MAL.