Barney uses his life savings of $300 to buy a car, which almost immediately begins to break down.

With only a week left in Hollywood, Lucy weeps about her lack of souvenirs. Her collection already includes a tin can run over by Cary Grant's rear tire, a napkin boasting Lana Turner's lip-prints and a few other goodies. But when Lucy discovers that John Wayne's cement footprints at Grauman's Chinese Theater are loose, she and Ethel scheme to pry them out of the ground.

A strange cat appears at the Cleaver's door and Beaver takes it in and feeds it. However, when the owner is found, and the cat is returned, Beaver finds himself with a dilemma: The cat keeps coming back!

Wally gets a job at the ice cream parlor leaving a gaggle of girls swooning and Eddie and Lumpy feeling neglected. So to get back at him, Eddie and Lumpy concoct a plan of revenge that involves Mary Ellen Roger's slumber party.

Granny has come up with a new way to split Elly and Mark up and has called Shorty Kellems to help her do so. When Shorty arrives, she tells Mark that Shorty used to be Elly’s fiancé and wants revenge on Mark, but her story fails. At this time, Drysdale is trying to tell Jed that oceanography is a bad idea, but doesn’t succeed and ends up saying Miss Jane said it.

Granny still believes Mark can turn people into water critters and turned Shorty into a seal. She gets the frogman to turn him back and continues to try to break up Elly May and Mark by having Elly cook for Mark. Meanwhile, Drysdale tries to keep Jed from withdrawing his money from the bank for oceanography research, this time dressing up as Napoleon.

Erika Tiffany Smith lands on the island looking for a place to start a new resort, and find a new husband.

A crate containing coconuts is wrapped in an old Honolulu newspaper that says one of the castaways is being sought in a murder investigation.

Naomi and Vint decide to adopt a child. But when they—and Mama—meet with an adoption counselor, they are rejected by the adoption agency.

Hoping to raise money now that a baby is on the way, Naomi and Vint begin selling Mama's homemade tonic.