While Fred is taking out the trash outside of his house, he is observed by the pointy-eared, whir-voiced, shadowy occupant of a flying saucer. The "little, green man"'s mission to invade prehistoric Earth.
As part of his mission's first phase, infiltration and examination of Stone Age society, the otherworldly scout copies the structure of Fred's body and garments- behind Fred's back, and creates ten duplicates of Fred, all of them powerfully strong but possessing the limited vocabulary of a monotone "Yabba-Dabba-Doo!", and releases them to disperse into Bedrock, stepping into and out of Fred's life without Fred's immediate awareness and causing some trouble and chaos (nocturnal ransacking of the Rubbles' icebox and clobbering of Barney with a sandwich after Barney demands an end to "Fred's" midnight feast) and some benefit (helping Slate to impress potential business client Rockwell in a display of fierce golf prowess, which Rockwell interprets as indicative that Slate's employees are all in prime physical condition) for Fred, who suspects that something strange is afoot but does not in his wildest imaginings consider the existence of multiple doppelgangers of alien manufacture.
When he finally learns that Flintstone impostors are ambulating in Bedrock, Fred infers a practical joke by his Water Buffalo pals and, seeing his replicas on a street, chases them into their headquarters, the flying saucer, in which pointy-ears declares his subterfuge thwarted and exposed by the formidable Earthlings and aborts the planetary conquest plan, expelling Fred from the flying saucer before it launches into space.
Now fully cognizant of the alien factor, Fred tells to Wilma and the Rubbles his account of by himself ridding Earth of malevolent space creatures, and they, of course, do not believe it.
- Fred Flintstone
- Wilma Flintstone
- Barney Rubble
- Betty Rubble
- Pebbles Flintstone
- Bamm-Bamm Rubble
- Mr. Slate
- Rockwell (only appearance)
- Robot Fred Duplicates (only appearance)
- News Reporter (only appearance)
- Alien Master (only appearance)
- Joe Rockhead (mentioned)
- Sam Shale (mentioned)
- Golf clubs
|Alan Reed||Fred Flintstone|
|Jean Vander Pyl|| Wilma Flintstone|
|Mel Blanc|| Barney Rubble|
|Bea Benaderet|| Betty Rubble|
|Don Messick|| Bamm-Bamm Rubble|
|John Stephenson|| Mr. Slate|
- The TV announcer mentions the Dow Stones rock market (Dow Jones stock market).
- The music in the background is from the William Tell Overture, also known as Happy Anniversary from the episode of the first season, "The Hot Piano".
- The episode name is a reference to the nursery rhyme, Ten Little Indians.
- During the episode's finale, when the spaceship lands for the second and last time, it appears to be night time. But at the same moment where Fred is chasing all of his duplicates down the street, it appears to be daylight.
|Season 4 of The Flintstones|
|"Ann-Margrock Presents" • "Groom Gloom" • "Little Bamm-Bamm" • "Dino Disappears" • "Fred's Monkeyshines" • "The Flintstone Canaries" • "Glue for Two" • "Big League Freddie" • "Old Lady Betty" • "Sleep On, Sweet Fred" • "Kleptomaniac Pebbles" • "Daddy's Little Beauty" • "Daddies Anonymous" • "Peek-a-Boo Camera" • "Once Upon a Coward" • "Ten Little Flintstones" • "Fred El Terrifico" • "The Bedrock Hillbillies" • "Flintstone and the Lion" • "Cave Scout Jamboree" • "Room for Two" • "Ladies' Night at the Lodge" • "Reel Trouble" • "Son of Rockzilla" • "Bachelor Daze" • "Operation Switchover"|