United Plankton's annual Swimtacular is a saturated celebration of super heroics! In "SpongeBob BabysitterPants" Mermaid Man is turned into a mewling infant in a Mermalair mishap. And guess who babysits him? Then comics legend Neal Adams depicts a new more relevant, more groovy Mermaid Man in a story we didn't have to call "The Green Harpoon's Challenge!" Also: advertisements for next year's Saturday morning cartoon cause a crisis in SpongeBob's life, Pearl has a comic convention at the Krusty Krab, and Patrick becomes the new embarrassingly clad hero Speed o' Lightning!