The Flintstones and the Jetsons #21
In "It's About Time!", Elroy’s tinkering with the treadmill sends him, George, and Astro hurtling back to the Stone Age—where they trade lives with Fred, Barney, and Dino in a hilarious case of prehistoric role reversal. Written by Allan Neuwirth and illustrated by Fernando Yache, with inks by John Lowe and Jeff Albrecht, this 1999 DC adventure blends classic cartoon charm with time-bending fun. The cover by Glen Hanson and Mike DeCarlo captures the chaos perfectly.
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When Elroy tries to fix the treadmill, he accidentally sends himself, George and Astro back to the stone age where they switch places with Fred, Barney, and Dino.
Plot details indexed by the Grand Comics Database (CC BY-SA).