Wayne's Chameleonator makes people invisible. The Chameleonator was originally made to change the people's skin color, so they wouldn't need to use make-up anymore. A mole in the company is telling another company about the invention. Amy and Wayne must stop the mole and get his invention back from the company that took it.

Ar'nox the alien, who was in "Honey, They Call Me The Space Cowboy", returns. This time he comes for a visit only to have his space ship stolen again. Now the Szalinski must get the space ship back, stolen from the so called "Men in Black".

Wayne invents a way to make veggies bigger, only it turns the veggies into big bad mutants. Quark eats some of the stuff after the Szalinskis killed the Mutant Veggies. So now Quark is mutating and looks like Godzilla! Can the family get Quark back to normal before he destroys the town?