Synopsis:

Original Airdate: ?/?/1985

While the Widgets gather to celebrate the launch of the Coridite reactor that will power Eternia, one among them, Smudge, has taken to the carnival pleasures of a trickster named Melbrag. Eventually, Melbrag dupes Smudge into gambling away a sample of Coridite. Smudge replaces the lost Coridite with a sample from the mines, but a recent flood has turned the Coridite radioactive by introducing the chemical Selenium. He-Man pursues Melbrag and destroys the lost Coridite, then returns to the celebration and throws the nuclear reactor into space before its contaminated Coridite makes it explode.

Synopsis by Zadoc Angell