At the races at Hollystone Park, Fred and Barney wager on dinosaurs picked by the Great Gazoo. Gangsters take note of their success and kidnap the two friends so that they can make winning picks for them.
Conversing with his leader, the Great Gazam, via Fred's television, Gazoo learns that his exile remains effective and that he must continue to do good deeds for Fred and Barney. Gazoo is distraught that he is still unwelcome on Zetox, and Fred and Barney console him. Fred and Barney are amazed to discover that Gazoo is adept at predicting the improbable outcomes of dinosaur races, and the pair decide to gamble on Gazoo's ability by attending a race at Hollystone Park and placing bets on dinosaurs picked by Gazoo to emerge victorious.
A pair of thugs, Stoney and Needle Nose, realize that Fred and Barney have a surefire system for choosing winners and that the mysterious Gazoo of whom they speak is their lucrative mastermind. As usual, Fred and Barney are caught by the criminals and threatened with physical harm if they fail to summon Gazoo.
"Mr. Big" Ed McRock, the criminal leader, a karate expert who can reduce rocks to rubble with a swing of his hand, vows to enact this process on Fred and Barney if they do not cooperate, but, predictably, Gazoo uses his powers to quash the schemers and rescue his friends. On this occasion, he snaps his fingers to cause the villains to karate-chop themselves or each other, thus rendering them painfully unconscious.
- Fred Flintstone
- Wilma Flintstone
- Barney Rubble
- Betty Rubble
- Pebbles Flintstone
- Bamm-Bamm Rubble
- The Great Gazoo
- The Great Gazam (only appeared on the TV screen)
- Stony and Needle Nose (only appearance)
- Ed McRock (only appearance)
- Flying Granite (only appearance)
- Royal Marble (only appearance)
- Happy Asphalt (only appearance)
- Slippery Slag (only appearance)
- Betting Office Man (only appearance)
- Cliff Crag (mentioned)
- Big Boulder (mentioned)
- Millstone (mentioned)
- Concrete Kiddy (mentioned)
- Eqqurock (mentioned)
- Zetokians (mentioned)
- Moola-Moolas (mentioned)
- Flintstone home
- Hollystone Park (only appearance)
- Bedrock Department Store
- Zetox (mentioned)
- Fishing pole
- Stony's car (only appearance)
- Police bicycle
|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|
|Henry Corden||Ed McRock|
Betting Office Man
- The title is taken from the old Broadway play, Three Men on a Horse.
- For one brief scene, Bamm-Bamm's shoulder piece is tan when it should be black, and Dino's snout is purple instead of tan.
|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"|