Synopsis by Hal Erickson
While the Flintstones and the Rubbles vacation in Rockapulco, Fred decides to don an elaborate mustache and pose as a "local." As a result, he ends up being the unwitting accomplice of a pair of jewel thieves. Ultimately, however, Fred becomes a hero...except in his own home town of Bedrock. Beginning with this episode, Janet Waldo takes over from Verna Felton in the role of Fred's mother-in-law Mrs. Slaghoople.