Local beach-goers find that their beach has been taken over by a businessman training a stable of body builders.
| Actor | Role |
|---|---|
 Frankie AvalonFrankie | Frankie |
 Annette FunicelloDee Dee | Dee Dee |
 Luciana PaluzziJulie | Julie |
 John AshleyJohnny | Johnny |
 Don RicklesJack Fanny | Jack Fanny |
| PPeter TurgeonTheodore | Theodore |
 Jody McCreaDeadhead | Deadhead |
 Dick DaleHimself | Himself |
| CCandy JohnsonCandy | Candy |
 Peter LupusFlex Martian (as Rock Stevens) | Flex Martian (as Rock Stevens) |
 Valora NolandAnimal | Animal |
 Delores WellsSniffles | Sniffles |
 Donna LorenDonna | Donna |
| BBob SevenMuscle Man | Muscle Man |
 Dan HaggertyMuscle Man | Muscle Man |
 Larry ScottMuscle Man | Muscle Man |
| CChester YortonMuscle Man | Muscle Man |
| SStephan MerjanianMuscle Man | Muscle Man |
| GGene ShueyMuscle Man | Muscle Man |
| GGordon CaseMuscle Man | Muscle Man |
 Alberta NelsonMuscle Girl | Muscle Girl |
 Amadee ChabotMuscle Girl | Muscle Girl |
| DDuane AmentBeach Boy | Beach Boy |
| GGary UsherBeach Boy | Beach Boy |
| GGuy HemricBeach Boy | Beach Boy |
| RRoger ChristianBeach Boy | Beach Boy |
| AAshlyn MartinBeach Girl | Beach Girl |
 Luree HolmesBeach Girl | Beach Girl |
| LLorrie SummersBeach Girl | Beach Girl |
| DDarlene LuchtBeach Girl | Beach Girl |