Lock up your beloved 50-year-olds! The baby boys have uncovered the Nifty Fifty community—a bizarre cult that collects unsuspecting 50-year-olds to worship a giant stone known as the "Stone of Stones."

Jenkins shares his grand plan with Owens and Hibbs: he's sending his Step Dad… Step Terry… his Step Father… his Terry… straight into the heart of the Nifty Fifty stone mines.

To save Terry from a fate worse than a midlife crisis, the baby boys must determine who among them is the true Indiana Jones—the one brave enough to infiltrate the Nifty Fifty mines and free the enslaved 50-year-olds.

Special guest appearance by: Gomp Gompers