The Flintstones and the Rubbles visit the Bedrock World's Fair, where they visit a time machine exhibit and travel to various times of the future.
Guest Cast
John Stephenson
voices TiberiusCast Appearances
Alan Reed
voices Fred Flintstone
Don Messick
voices Bamm-Bamm Rubble
Jean Vander Pyl
voices Wilma Flintstone
Mel Blanc
voices Barney Rubble
Gerry Johnson
voices Betty RubbleEpisode Discussion
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