Gomer decides to join the Marines, and Andy helps out by secretly convincing the drill instructor that Gomer is the son of a decorated general. The drill instructor takes Gomer under his wing and gets him to pass his inspection with flying colors, only to find out later the truth behind Gomer's lineage. (Pilot episode for the spin-off series "Gomer Pyle, U.S.M.C.")
Adam and Laura are finally engaged. Adam is secretly building a house and planning for the future. Laura realizes that it's Will she is in love with. Adam is then confined to a wheelchair after falling from a ladder and out of guilt, Laura and Will deny their feelings.
A traveling salesman meets up with Bull Foot, an Indian who mainly sells vegetables. When goods are traded for a squaw, he is upset when she runs away and into the arms of Festus, whose mule she steals, only to return home awaiting sale to the next customer.
The Doctor and his friends must locate the real murderers and the fourth key before heading off for a final confrontation with the Voord
Jed becomes head of a corporation, which Drysdale organized for him as a tax write-off. The Clampetts decide they want to help out at their corporation, and get the penthouse suite in the bank building. They get all dressed up, Elly in one of her ball gowns, and go to the bank.
While on a camping trip with Opie and his friends, Barney brags to Gomer about his outdoor skills and promptly gets them lost in the woods. When Andy finally does find them, he and Gomer hatch a plan to save Barney the embarrassment and prove to everyone what a mountain man he really is.
Laura Dayton's Aunt Lil comes to visit and quickly decides it's time she help the hesitant Adam propose to her favorite niece. Her plan is to make Adam jealous by using his cousin Will but it doesn't go exactly as planned.
Rob Scot considers himself a man who could stay or go when it came to women. He may have met his match though when a woman he desires, along with her husband, take over an abandoned homestead, and they come to where Rob works to look over some stock.
Jared Garrity arrives in the Old West town of Happiness, Arizona, proclaiming he can revive the dead.
Having been given a stylish makeover by a famous French couturier, Elly May is mistaken for a visiting foreign princess by Mrs. Drysdale. Hoping to get in good with "royalty," Mrs. Drysdale throws a fancy party for Elly. This time around, the old dear is certain that her soiree won't be invaded by "those dreadful hillbillies."
Two women with a body in their car trunk come upon a house by chance wherein a crazed inventor has a machine that can bring back the dead.
After an off-hand comment puts Barney in the doghouse with Thelma Lou, he sees her spending her free time with Gomer instead. Not wanting to hurt his friend, Gomer tries to get her to stop seeing him by falsely professing his love, but ends up engaged to her instead.
Moody bounty hunter, Dev Farnum, shows up on the Ponderosa, where the Cartwrights are harboring the wife of the man he is after.
Given three months to live by a quack peddler of patent medicines, a mousy bank clerk quits his job, withdraws all his money, makes ready to go to California, and falls for a girl who may endanger what time he has remaining.
Searching for the third key, Ian and Barbara meet with the sinister trapper Vasor before following Susan and the others into a cave system guarded by the mysterious Ice Soldiers.
A World War II veteran and a Japanese-American gardener battle each other over a war that ended more than 20 years ago.
Granny is waking up the family so they can get to their new store: The House of Granny. Jethro wakes up sleepy, not wanting to be up, but as soon as Granny mentions breakfast, he is dressed in a split second. Jed is carving a Y in the kitchen, and when Jethro sees the shavings in the bowl, he thinks it is cereal. Jed tells him to have corn flakes instead. Granny goes to wake up Elly May, saying that her store opens at a decent hour—the crack of dawn!