Fred and Barney are on jury duty and the jury convicts "The Mangler" of robbery. After his conviction, The Mangler vows to get even with the foreman of the jury, Fred. The convict escapes from prison the very next day and Fred fears that The Mangler is going to get him.

The Flintstones and Rubbles visit a carnival, and Fred decides to buy the carnival unaware of the problems it has.

Elizabeth Montgomery and Dick York guest star as new neighbors, Samantha and Darrin (from Bewitched), who move next door to the Flintstones. Fred and Barney take a camping trip without Wilma and Betty. Samantha then decides to help Wilma and Betty follow the husbands to the woods.