The Jetsons Meet the Flintstones

Elroy Jetson wants to prove his time machine works, so he sends himself back to prehistoric times. He lands among the Flintstones, with Fred (Henry Corden) and Barney (Mel Blanc) pulled into the middle of it. Ray Patterson and Don Lusk set the two families side by side, one with robot maids, the other with stone cars, and the kids and the grown-ups get to know each other across ten thousand years.