Andy's admonishment to Opie about dealing fairly with others "snafus" when he subsequently trumps up a fanciful story to sell a worthless cannon to an out-of-area antiques dealer.
Nice as they can be to others, Fred and Jennie Boone snap at each other violently at home. Andy intervenes on behalf of the general peace but learns that others can express their happiness differently.
Barney becomes a laughing stock after being left in charge and arresting upstanding townsfolk over petty violations. Andy must step in and make them appreciate Barney before he quits.
With Barney tongue-tied around potential sweetheart Thelma Lou, Andy sticks his big nose in on their behalf only to find himself and Ellie pulled into romantic duplicities.
Ellie crosses the line when she insists on a farm girl wearing make-up and perfume against her hard-pressed father's wishes, leading Barney to commit an abduction.
When the Scobey family misses a mortgage payment, Ben Weaver insists Andy serve them a foreclosure notice immediately, but Andy aims to save the Scobeys their home.
Barney grows increasingly wary of a reticent new farmer in town, calling up a posse during a thunderstorm when it seems Andy has walked straight into the man's nefarious trap.
After he handcuffs a classmate to a flagpole, Aunt Bee insists the jail is no place for Opie to hang out, but denying him contact with his pa puts him at greater risk.
Andy, through Barney, learns that Opie has been targeted by a bully who's been shaking him down for milk money, leaving Andy to wonder how to intervene without letting Opie know he knows.
When the State Attorney's Office sends Andy a man to give practical lawman experience to, Barney believes Andy wants him to train a "replacement" deputy.
An out-of-town speeder thinks Andy runs a speed trap in Mayberry. Awaiting her day in court gives her plenty of time to work on swaying the witnesses - Barney, Floyd and Opie.
The callous eviction of a down-on-his-luck elder citizen comes back to bite the town council when the man's uncashed municipal bond amounts to more than the town can pay.
After a spat with Thelma Lou, a sophisticated new girl arrives in Mayberry and takes a surprisingly deep interest in Barney, trapping him in an unintentional proposal.
All but Andy get excited over Mayberry's distinction at being named the most crime-free town in America, unaware they're being targeted by criminals while honoring their lawmen.
Barney and Thelma Lou successfully match-make Andy and Thelma Lou's cousin Karen, but Barney's unfortunate way of describing the situation has Karen rifle-ready to shoot down Andy's supposed inflated ego.
Handyman Henry Wheeler enters the Taylors' life, for whom Aunt Bee develops a wistful soft spot. For her sake, Andy keeps him on with chores but progressively discovers Henry's true vocation - that of a freeloader.
When Andy and Barney have a chance to join an exclusive men's club, Andy wonders how to break it to sensitive Barney when he learns they only want Andy.
No one will admit to Aunt Bee's homemade pickles being the worst they've ever tasted. Andy switches them with store-bought ones to avoid eating hers, but her decision to enter them in the county fair presents a dilemma.