Season 1

Sgt. Dale sends Stainboy to investigate the mutant Stare Girl, who is gifted with hypnosis.

Sgt. Dale instructs Stainboy to look into a mutant called Toxic Boy, who creates clouds of toxin by belching.

Sgt. Dale sends Stainboy to take care of an evil entity, Bowling Ball Head, who's been causing mayhem at a local bowling alley.

Sgt. Dale sends Stainboy to stop Robot Boy, a dangerous robot who's been causing TV power outages.

Sgt. Dale instructs Stainboy to apprehend the deadly Match Girl, who's been lurking at a nearby gas station.

On his day off, Stainboy has a flashback to his birth and early childhood.