 Fred fears a visit by Jethro Hatrock, who was in feud with his family in the past, but he comes in peace as he is on the way with his family to the World s Fair. But Fred s generosity goes too far, as the Hatrocks extend their stay at the Flintstones household, and Wilma does not like it. To get rid of the Hatrocks, Fred send them to the Gruesomes with no luck. However, he founds something the hillbillies really hate: Bug Music ! This might be the solution !