Opie develops a crush on a secret girlfriend, and gets advice on what kind of present to get her. When he comes up with a pair of nylon stockings, Andy intercedes, suggesting something less personal, like flowers. Later, Andy discovers that the secret girl is Opie's teacher, Helen Crump. Andy informs Opie that he doesn't appreciate him cutting in on his girl, and Opie relents.

Barney has to gain weight and somehow grow taller in a week's time in order to meet new guidelines for sheriff's deputies or lose his job. Can he do it?

The Taylors find that a visit from relatives comes with complications.

Ernest returns to school to win a girl's affection.

An old beau of Aunt Bee's returns to court her, but he has an annoying sense of humor.

Barney tries to train a mutt, then wants to use him to help capture an escaped convict, despite Andy's objections.

Barney and Thelma Lou have an argument. They reconcile quickly, but it leads to other arguments between Andy and Barney, Thelma Lou and Helen, Andy and Helen, and another between Barney and Thelma Lou.

When a tough guy threatens to beat up Barney if he catches him out of uniform, Barney begins to wear the uniform all the time.

Opie finds a change purse and almost gains $50.

Andy considers taking a job in Raleigh, and lets Barney take over as sheriff for a day to prepare him for the office.

When Clara has to suddenly go out of town Aunt Bee gets the leading role in Mayberry's Centennial Pageant, but her acting skills aren't quite up to the task.

The musical Darling family descends upon Mayberry again. This time they are looking for a husband for Charlene's new baby daughter. Things get complicated when they choose Opie and refuse to take no for an answer.

Andy and Helen go on a picnic but are plagued by constant interruptions from Barney, Goober and others.

Barney buys a fortune-telling game and lets Opie try it out.

After Otis falls down in the sheriff's office, a sleazy lawyer convinces him he would be helping Andy and Barney if he were to sue the county.

Barney decides to try his hand at the real estate business. He has a plan that will net him commissions on three sales. Crucial to the deal is Andy selling his house and buying another.

While Barney is on vacation in Raleigh, Andy needs to find someone to fill in as a temporary deputy. When Andy himself has to go to a sheriffs safety conference for a few days, nobody is available, so he is stuck with Goober. Goober doesn't take the job seriously (still working at the filling station). It gets so bad that Goober begins to work on cars at the sheriff's office and even ends up completely dismantling a car and reassembling it right inside the courthouse.

Barney tries to rehabilitate Otis after he rides a cow, thinking it is a horse. Barney arrests Otis when it happens again, even using handcuffs. Otis leaves town and vows to never return.

Barney gets a chain letter that predicts bad luck it he doesn't make copies and send them to friends. To prove to Andy that he's not superstitious, he doesn't send any. A constant stream of back luck is the result. Things look bad when he has a marksmanship test coming up, which he has to pass in order to keep his job.

When Andy and Barney get tired of Goober tagging along on their dates, they decide to try teaching him how to act around women and then get him to ask a girl on a date. It proves to be quite a project.

Barney decides to run for sheriff when he thinks Andy is leaving Mayberry. When Andy ends up staying, Barney ends up running against him.

Barney finds $250,000 from a bank heist, then goes undercover to find the robber.

After Andy is profiled in a national magazine as the 'Sheriff Without A Gun', a television production crew shows up to research a possible TV show about Mayberry's police force. But the crew may have an ulterior motive.

Helen gets jealous when a very attractive friend of the family visits the Taylor household for a few days.

Barney finds an old police file about an assault between Floyd and Charles Foley from 19 years before. He refuses to let it go and stirs up a hornet's nest by investigating the case.

When nobody buys Opie's newspaper, Andy and Barney encourage him to print more interesting stories. Opie solves his circulation problem by publishing all the scandalous gossip from around town.

After Clara gives Aunt Bee the idea that her presence is preventing Andy and Helen from getting married, Aunt Bee names a married man as her imaginary beau.

Two flashy, amorous blonde gals from Mount Pilot get caught speeding through Mayberry and cause romantic complications for Andy and Barney.

A traveling salesman is plagued with bad luck.

When Helen tells Andy Opie isn't doing too well in math, he's pretty relaxed about it. She recommends that Opie should do a bit more homework and he agrees. Barney, however, thinks Andy's attitude is completely off base. Barney starts talking about how Opie may not get into college and the like and gets Aunt Bee all worried. Soon, Andy is just as stressed and he tells Opie to buckle down and cut out the play time. Helen soon reports to him that since they last spoke of Opie, he is actually doing much worse and not only in math. Andy can't understand since he's been quite strict with Opie who has done nothing but study. Helen suggests that that may just be the problem.

Opie tries to win Andy a birthday present at the carnival's shooting gallery but gets ripped off for all his money by a pair of hucksters using guns with crooked sights.

A destitute banjo player fills in for Barney.