Kate goes back to school--but learns the most valuable lesson from Grampa.
Things aren't so sweet between Kate and Luke after a company patents her preserves recipe.
Unknown to the McCoys, Pepino moonlights as a night-club singer.
Little Luke thinks that he doesn't have a sporting chance with Grampa as his relay-race partner.
Little Luke plants the seeds of trouble when he tells the McCoy household that he'd rather be a scientist than a farmer.
The rivalry between Grampa and George flares up again with the arrival of a pretty librarian.
Grampa gets fed up with the family's constant pampering.
Luke becomes frantic when he realizes that his green thumb doesn't work for what grows on top of his head.
Grampa takes on a scavenger hermit who is camping on the McCoy's land.
The McCoys are surprised to find out that George makes no mention of Grampa in his will.
The McCoys hire Nikko, a Japanese girl, to help around the house.
Grampa has no choice but to accept a horse as payment on a loan.
Problems arise when the McCoys take in a city boy and try to fit him into their style of living.
Cousin Claude talks Grampa into investing in an oil well.
Things backfire on Grampa when he schemes against a fellow fruit-stand operator.
Kate seems to be having too good of a time in Bakersfield, much to Luke's dismay.
Grampa feels the pain when George tries to collect on the McCoy's insurance policy after an accident.
Grampa battles the U.S. Army after they take one of his cows.
Rivalry insues when Luke and Grampa set up competing booths at the PTA bazaar.
The McCoys hire a beautiful housekeeper in Kate's absence, leading to widespread gossip.
Grampa has to teach Sunday school class after a failed scheme against the pastor.
Little Luke makes a few errors with his new girlfriend.
Grampa schemes against George after losing a role in the Grange play.
Grampa plots to keep George on his farm after retirement.
Pepino questions how to pay for his wedding, and Grampa has the answer.
Hassie does more than her best to convince a sorority that she shouldn't be overlooked for membership.
Kate comes home from the hospital, and tries to jump back into her household chores despite everyone's objections.
Grampa is convinced to stop using his cookie jar and to start putting the McCoy funds into the bank instead.
A civic group has their hands full after they try to fool Grampa.
The McCoys fly back to West Virginia to celebrate Great-Grandma's 100th birthday.
Grampa causes trouble for his relatives in West Virginia when he holds up a proposed plant expansion.
Grampa feels like he is young again when he encounters an old sweetheart.
Kate gets the wrong idea after Luke is complimentary about a new female neighbor's cooking skills.
Grampa is astonished when $200 falls mysteriously right out of the sky.
Little Luke thinks he is a knockout with his female classmates.
The McCoy's wealthy neighbors invite Hassie along for a trip abroad, but Grampa is obstinate.
Luke thinks his rural accent is holding him back, and takes elocution lessons.
A matador convinces Pepino that he was meant to be a bullfighter, but Grampa doesn't agree.
George's new housekeeper steals his heart.