Barney learns that the car he's spent his life savings on is a lemon, and the little old lady he bought it from may have put one over on him. When Barney and Andy set out to return the car and arrest her, however, they find the hardest part may be just getting there.

Opie tells Andy about his new friend Mr. McBeevee, who Andy believes to be a figment of Opie's imagination. But when Andy begins to suspect Opie is using his new-found friend as an excuse to lie, he decides to set the record straight and prove Mr. McBeevee doesn't really exist. Or does he?

Barney loses his self-confidence when two unlawful bullies laugh off his attempt to run them out of town. Andy tells them Barney is actually a trigger-happy lawman out for vengeance, but the bullies quickly see through the ruse and Barney now must find the courage within himself to stand up to them.

When Mayor Stoner decides not to cover the expense of sending the Mayberry Marching Band to their annual competition in Raleigh because he thinks they're terrible, Andy helps out by having a few of his friends from "Freddy Fleet And His Band With A Beat" step in.

Barney becomes convinced the Mayberry bank is ripe for a robbery and tries to prove his point by staging a fake one. When he discovers a weak spot in the security system, he unknowing relays this information to a couple of actual robbers.

Malcolm Tucker, a business tycoon from Charlotte, has the unfortunate luck of having his car break down in Mayberry on a Sunday. Now he's willing to do just about anything to be on his way, including stealing Gomer's truck. Andy invites the man over for Sunday dinner to try and teach him the importance of relaxation before he does something he'll really regret.

Andy gets a letter from a criminal he had wounded years before and learns the man is coming to Mayberry to see him. Barney becomes convinced the man wants revenge and enlists Gomer and Otis to secretly protect Andy, which ends up wreaking more havoc than any criminal ever could.

Cy Hudgins has a pet goat with a taste for dynamite and Andy and Barney are forced to put it in a padded cell until the danger "passes." But when Otis unknowingly lets their new prisoner out, it's up to Barney and his harmonica to safely lead the goat out of town.

Opie's new friend Arnold is a spoiled brat used to getting his own way. He convinces Opie to try and get a raise in his allowance by throwing a temper tantrum, showing Andy that he must teach Arnold's father the importance of discipline before Opie picks up any more of Arnold's spoiled habits.

Andy suggests to Gomer that he hire a troubled young man named Jimmy to help out at Wally's gas station. But everyone soon suspects Jimmy of being a thief after valuable items start disappearing from the station. Andy believes Jimmy is innocent but must prove it, even when all the evidence is against him.

There is a new mayor in town who is immediately put off by Andy's laid back management style. When Andy lets a prisoner out of jail for a few days so he can harvest crops, he finds his job is suddenly on the line, especially when the prisoner doesn't return.

Two cows suddenly go missing in Mayberry and Mayor Stoner has decided to bring in a professional investigator to solve the crime. The investigator's conclusion goes along with what the rest of the town already suspects, but Andy has his own idea of what happened, an idea just crazy enough to be true.

Barney and Floyd stumble upon a cabin in the woods where three dangerous female convicts are hiding out. They are taken prisoner and it's Andy to the rescue when he manages to capture two of them. But it's up to Barney to get the third using all the charm he can muster, along with his best Rudolph Valentino impression.

A new boy named Quincy moves into town and starts getting Opie and his friends into trouble. When Opie is dared to break a streetlight, he refuses and is teased mercilessly. Andy tries to help by telling the boy's parents, but Opie sees that it's up to him to stand up to Quincy once and for all.

Barney believes his job is on the line when he accidentally gives the governor's car a parking ticket. When he learns the governor is coming to town to see him about it, his nervousness causes him to drink cup after cup of water from the water cooler, the very same cooler Otis has spiked with alcohol.

Opie complains to Andy about how his new history teacher Ms. Crump is a mean old woman who likes to assign extra homework. Andy tells Opie it's not important if he doesn't know every answer, which leaves Opie believing history isn't important. Now Andy has to show Opie, and his class, how much history matters before Ms. Crump decides to quit.

A family of musicians who live in the mountains descend on Mayberry to await the arrival of their daughter Charlene's fiancee. When Andy tries to help by putting them up in the courthouse, he gets more than he bargained for when Charlene suddenly sets her sights on him.

Opie develops a case of puppy love for a girl in his class, but is crushed to find she isn't interested. Barney tries to lift his spirits by letting Opie hang out with him and Thelma Lou awhile. It works great, until Opie forgets his crush and sets his sights on Thelma Lou.

A pack of stray hunting dogs descends upon Mayberry at the same time that a state investigator has come to review Andy's request for more funds for the jail. Barney and Opie decide to bring the dogs to the courthouse to shelter them from a storm, not realizing that Mr. Somerset is already there.

The Darling clan is back and this time need Andy's help to wed their daughter Charlene to Dud Walsh before crazy old Ernest T. Bass makes good on his threats to kidnap her and take her for his own. Andy sets Barney up as a decoy bride while the real wedding takes place elsewhere. The plan works, until Ernest kidnaps Barney and decides he's just as good a bride as Charlene.

Andy is told to keep two big-time bandits in his jail until detectives from Tennessee come to get them. Knowing that the bandit's friends will try to break them out, Barney spots two suspicious men outside the jail and promptly arrests them. As it turns out, they are the detectives from Tennessee, giving the bandit's real friends the opportunity they've been waiting for.

Andy discovers Peggy comes from a wealthy family and starts to feel like he is unable to provide the kind of sophisticated company she is used to. He decides to stop seeing her and abruptly breaks it off, but without getting Peggy's Side of the story.

Given Andy's habit of burning meals, Aunt Bee asks Peggy to look in on Andy and Opie while she's away visiting her aunt. When word gets around town, however, Andy is told Peggy's cooking may be her way of buttering him up to the idea of marriage.

When Andy and Peggy must break a date, Barney mistakenly sees this as the end of their relationship. He decides to play matchmaker to help Andy mend his broken heart, with disastrous results.

Floyd comes to Andy for help after telling his pen pal Ms. Grayson that he is wealthy and finding out she is coming for a visit. Andy helps Floyd keep up the appearance of wealth while she's in town and in the process learns just how deceiving appearances can be.