The Great Gazoo takes the Flintstone and Rubble couples into the 21st century.
Fred reclines on his hammock during a holiday weekend on which Wilma's mother, Pearl Slaghoople is visiting. When Fred scoffs at Barney's Rock Rogers comic book for its supposedly ludicrous prediction of far-future space travel, he is chastised by Gazoo: "Flintstone, when you laugh, you show not only your tonsils but your ignorance." Leaving their children in Pearl's care, the Flintstone and Rubble couples go for a pleasure drive in Fred's car, only to be caught in freeway traffic.
Gazoo appears and offers to Fred a glimpse of the future by transporting Flintstone car and occupants there, with the road-automobile changing to an air-car of a futuristic design. Gazoo assures Fred and Barney that Wilma and Betty will accept the experience without question and will not remember it after it has ended.
So, Flintstones and Rubbles explore a city with shops and restaurants in the clouds, moving sidewalks, jet-powered dinner trays and tiny servings of meat, robot barbers, and public transportation to Mars, where Fred, Wilma, Barney, and Barney stray from the main tourist group and are terrified by a three-headed monster that is really a costume for actors in a movie.
Scurrying back to their space-bus, the Flintstones and Rubbles are brought back to Earth, where Fred visits the still-operating Slate Construction and meets Slate's distant descendant. Gazoo then returns the Flintstones and Rubbles back to the Stone Age, and Fred thanks Gazoo for the look at things to come, but nevertheless prefers his own time.
- Fred Flintstone
- Wilma Flintstone
- Barney Rubble
- Betty Rubble
- Pebbles Flintstone
- Bamm-Bamm Rubble
- The Great Gazoo
- Mr. Slate
- Pearl Slaghoople
- Mr. Slate the 80,000th (only appearance)
- Stewardess (only appearance)
- Aliens (only appearance)
- Three-headed monster (only appearance)
- Rock Rogers (only appearance in a magazine)
The Present (Stone Age)
- Flintstone home
- Slate Rock and Gravel Company
- Bedrock Hammock Company (mentioned)
The Future (Space Age)
- Bedrock Discotheque (only appearance)
- Barber shop (only appearance)
- Restaurant (only appearance)
- Slate Rock-N-Gravel Company
- Mars (only appearance)
- Venus (mentioned)
- Croquet balls (only appearance)
- Croquet mallets (only appearance)
- Lie detector (only appearance)
- Super Space Stories magazine (only appearance)
- Brontosaurus ribs
- Corn beef and cabbage (only appearance in food pills)
- Lamb chops (only appearance in food pills)
- BBQ steak (only appearance in food pills)
- Fred's car
- Air-cars (only appearance)
- Rocket bus (only appearance)
|Alan Reed||Fred Flintstone|
|Jean Vander Pyl|| Wilma Flintstone|
|Mel Blanc|| Barney Rubble|
|Gerry Johnson|| Betty Rubble|
|Don Messick|| Bamm-Bamm Rubble|
|Harvey Korman||The Great Gazoo|
|John Stephenson|| Mr. Slate|
Mr. Slate the 80,000th
|Janet Waldo||Pearl Slaghoople|
- This episode title was used after the episode of the first season, The Long, Long Weekend.
- The city of Bedrock's futuristic design was inspired from the series, The Jetsons.
- The company is still called Slate Rock N Gravel in the future, run by George Slate 80,000th.
- Rock Rogers is a spoof of the classic character, Buck Rogers.
- When Fred is reading the Rock Rogers science fiction book, as he turns the page, he turns it backward from how it should be turned.
|Season 6 of The Flintstones|
|"No Biz Like Show Biz" • "The House That Fred Built" • "The Return of Stony Curtis" • "Disorder in the Court" • "Circus Business" • "Samantha" • "The Great Gazoo" • "Rip Van Flintstone" • "The Gravelberry Pie King" • "The Stonefinger Caper" • "The Masquerade Party" • "Shinrock A Go-Go" • "Royal Rubble" • "Seeing Doubles" • "How to Pick a Fight with Your Wife Without Really Trying" • "Fred Goes Ape" • "The Long, Long, Long Weekend" • "Two Men on a Dinosaur" • "The Treasure of Sierra Madrock" • "Curtain Call at Bedrock" • "Boss for a Day" • "Fred's Island" • "Jealousy" • "Dripper" • "My Fair Freddy" • "The Story of Rocky's Raiders"|