The Flintstones: Season 6, Episode 18

6 - 18: Two Men on a Dinosaur

The Great Gazoo uses Fred's television to contact his home planet about returning there and is told, "Are you kidding?". In order to show that he is worthy of returning home, Gazoo decides to teach gamblers Fred and Barney a lesson by magically fixing the results of a dinosaur race at the race track. Fred and Barney wind up in big trouble after some gangsters spot them picking winners.