Herby is depressed when he gets drafted, so the girls cheer him up by suggesting he could be an astronaut. Uncle Joe hears this and decides he needs to promote Herby's future political career to the whole town. When Herby gets a discharge for minor medical problems, Kate finds a way for him to save face with Billie Jo and the rest.

When Kate unexpectedly sees Homer Bedloe in Hooterville, she knows trouble is in store. Bedloe plans on selling the Cannonball, a seemingly one-of-a-kind antique locomotive. His buyer is millionaire retired train man and antique train aficionado, Phillip Waterhouse. Waterhouse is an old, ornery and snobbish man who generally gets what he wants. With Charley and Floyd's help, Kate hopes she can convince Waterhouse that the train is in such disrepair that it's not worth buying. Kate's plan backfires when she learns Waterhouse enjoys repairing old trains. She hopes that with the family's help, she can get through to Waterhouse the necessity of the train to the valley.

A traveling salesman guest leaves Uncle Joe a set of six paint-by-number canvases in lieu of a cash payment. Joe decides to take up painting and hopes to make money with his new venture. Mr. Cheever, an antique dealer, buys Joe's first painting. Joe now thinks he is a new art master on his way to success. However, the dealer only wanted the valuable picture frame. Before wrapping up the painting, Joe trades the frame for one he believes is nicer. News of the painting sale spreads throughout Hooterville. People come by to see Joe's other paintings, including E. T. Gibbs from a local museum. Gibbs hates the paintings, which depresses Joe. Cheever comes back to get the original frame he bought. Kate comes up with a plan for Cheever to get the frame and for Joe to feel better.

Betty Jo has her first crush on a boy named Orville Miggs. But the object of her affections is more interested in tinkering with cars than he is in romance. As such, all Orville sees in Betty Jo is a mechanic's expert assistant. Kate doesn't want to see Betty Jo get hurt. Kate thinks he will see her in a different and more romantic light if she wears a dress and becomes a bit more feminine. But nothing they try makes Orville really notice Betty Jo, and ultimately give her her much wanted first kiss. If the family is able to accomplish their task, will Betty Jo ultimately think it was worth it?

Homer Bedloe is back in Hooterville trying yet again to find a way to shut down the Cannonball. He believes there must be something in the financial books since Charley and Floyd have not submitted a report in twelve years. That plan ends up being more confusing to Bedloe than it's worth pursuing. Meanwhile, Uncle Joe is given the task of digging a drainage ditch down by the tracks. He finds the lazy way to do it by advertising that guests can dig for silver down by the tracks. He figures others will do the digging for him. Bedloe decides to sell leases all along the track from Hooterville to Pixley for people to prospect for silver. In the process, all the digging will just rip up the track, leaving the train unable to run without major repairs to the track. Kate can see through Bedloe's scheme and she devises a way to outsmart him once again to keep the Cannonball running.

A regional talent contest is being held in Hooterville with the winner being awarded $50 and a trip to Chicago for the television broadcast final. Kate worries that competition among the girls will affect the family. Uncle Joe has other thoughts where he wants the girls to compete their hearts out with the goal of winning. The girls agree in that they figure Kate could use the $50. With the ulterior motive of being the adult chaperon for his winning niece in going to Chicago for the final, Uncle Joe tries to convince all the credible competition not to enter the contest. Kate wants the contest to be fair and undoes all of Joe's scheming. After their performances, the girls decide they were only thinking of themselves and drop out of the competition.

An old school chum named Emily Mapes thinks it's time Kate was married again. She tells the girls to round up some prospects to go to the Shady Rest to court Kate. The girls do this by offering special rates to single men. However, Uncle Joe thinks that if Kate finds a man, he will lose his job. Joe even pretends to be the house detective and tells guest Grover Woodstock to leave Kate alone. Kate finds out from Grover what her daughters have been up to. She comes up with a plan with all the men to teach her girls a lesson.

Beatlemania has hit Hooterville by storm. Uncle Joe recruits Billy, Bobbie, and Betty Joe along with their friend Sally Ragsdale to form their own band called the Ladybugs. Colonel Partridge, a booking agent, comes to the Shady Rest to see the girls in action. Partridge likes what he hears and wants to book the girls. Sally's father, Sheriff Ragsdale, comes by and says he wants his daughter to finish school and not tour the country. Uncle Joe thinks he has a way to save the group and dresses up as a Ladybug.

Uncle Joe gets angry at Charlie and Floyd when he is left behind by the Cannonball. He decides to start his own transport business by using Orville Miggs' "Flivverball", an old car converted into a railway car. At first the Flivverball is a success. Kate must now deal with the feuding groups before the Cannonball goes out of business.

Norman Curtis, President of the C&FW Railroad, is currently on vacation in Europe. He left instructions not to do anything to the Cannonball while he's gone. However, Homer Bedloe has a scheme to shut down the Cannonball for good. He hopes to do it without disobeying Curtis' orders. The plan entails Bedloe being appointed Superintendent of the Cannonball. He would then enforce an efficiency program with an impossible to meet new schedule. He expects Charley and Floyd will eventually just give up. Kate and the gang go to the stockholders meeting where she believes they've got a secret weapon to ruin Bedloe's plans.

Mr. Bunce with the bank is doing an inspection of the hotel and is not planning on extending Kate's financing. Wealthy socialite Clara Watkins checks into the hotel with her son Sonny. Bunce will only extend Kate's financing if Mrs. Watkins recommends the hotel to her friends. Meanwhile, annoying Sonny is constantly chasing after Billie Jo. Mrs. Watkins wants the two of them to get married. While Kate has done whatever she can to please Mrs. Watkins, she has to say no to that. Uncle Joe decides to romance Mrs. Watkins instead and she soon accepts his marriage proposal. Kate comes up with a plan to save Joe and the hotel.

Charley begins to believe that everyone seems too busy to spend any time with him. Floyd has started to call on the widow Sarah Lawrence. Uncle Joe has a speech he has to prepare, so has no time to go fishing with him. Kate has far too much work to do around the hotel. Charley doesn't want to spend his time alone and miserable running the Cannonball. He decides to quit and move to the big city. Kate tries to manufacture ways of keeping Charley in the valley before his replacement Bill Tuttle comes and takes over his job. When Charley realizes how much he is loved and needed, he finds a way to talk Tuttle out of staying.

Kate receives a telegram from Railroad President Norman Curtis that he is sending Homer Bedloe with someone named Fred. Fred is actually Mr. Curtis' housekeeper's aged basset hound. Curtis believes Fred needs some good country air and space to re-energize himself. Curtis also hopes that Bedloe will soften his ways in the process. Bedloe comes up with the plan to "ruin" Fred and have him return to Curtis in worse shape than he arrived. That will hopefully sour Curtis' view of the Shady Rest and what it stands for. Kate figures out a way to bring back spirit to Fred and a way to break Bedloe's spirit.

An old friend of Kate's from high school is coming for a visit. Kate admits that she had a crush on H.J. Grant back then. His letter implies that he is now wealthy, and is coming back to the valley on personal business. Uncle Joe, however, believes that Herbie is a con artist after Kate's money. Uncle Joe decides he needs to break up any chance of a romance between Kate and Herbie. Orville finds a newspaper article that proves Herbie is wealthy. Now Joe wants Kate to marry Herbie. But Kate and Herbie want to remain just friends.

Homer Bedloe arrives at the Shady Rest with his son, Homer Bedloe Jr., who is as hateful and devious as his father. He even looks like his father down to the horn-rimmed glasses. Bedloe Sr.'s plan is that he wants to appear the loving and caring father, bringing his son up right. Then he will leave Jr. alone at the Shady Rest to snoop around and find a way to shut down the Shady Rest and the Cannonball for good. But Jr. comes to like everyone because he is treated with kindness and goodwill for no apparent reason.

Business executive Mary Jane Hastings returns home to Hooterville to receive the Chamber of Commerce award. She commands attention just by her very presence, with everyone being at her beck and call. Kate doesn't like the effect Mary Jane has on her girls. Kate blames Mary Jane's assistant Steve, who is setting the example that what Mary Jane wants, she gets. Kate learns that Steve is in love with Mary Jane. Kate tells Steve he needs to stop being the ever obedient servant. But when Steve stands up to Mary Jane, she fires him. After learning that Mary Jane is in love with Steve, Kate finds a way to bring them back together.

Uncle Joe wants to dig out an old cave to use as a wine cellar for the hotel. Kate receives a telegram from Brooks T. Webster, who wants to possibly hold a convention at the Shady Rest. He will be arriving that afternoon. Uncle Joe causes a landslide covering up the cave entrance with Kate inside the cave. They will need Ding Woodhouse's tractor to remove all the rubble to get Kate out. But Ding's tractor needs some work done on it and won't be ready until the morning. Mr. Webster arrives and insists on dinner, but Kate isn't there to cook. Uncle Joe comes up with a plan to feed Mr. Webster and get the convention business. But is Mr. Webster the only one they need to impress?

Kate has sprained her ankle which means she will be off her feet for three or four days. Now that Mr. Webster's gone, the family has to prepare for Mr. Feasel's visit. He is the one that will decide if the convention will be held at the Shady Rest. Uncle Joe decides to make some changes to the hotel he's sure will appeal to conventioneers. He also hires Smokey Harner, a country singer and guitarist. Hearing about all the new ideas, Kate believes Uncle Joe and the girls may be running the hotel better than she did. Mr. Feasel arrives early and is not impressed with anything about the hotel. Kate recovers quicker than Dr. John Rhone expected. But she wants to keep her recovery a secret because she thinks everything is running smoothly and wants the family to feel good about themselves. With everything going wrong in the hotel, Mr. Feasel leaves. Kate finds out that Feasel has left. But he later returns for a very unusual reason.

Kate's former grade school teacher returns to Hooterville. Kate and her children reminisce how Miss Adelaide "Genghis" Keane was so strict on all the children, and she was a dreaded teacher. Kate and the girls are surprised to find that the elderly schoolteacher is no longer the tyrannical disciplinarian she used to be. They all get together to bring Miss Keane's confidence back. It doesn't take long for Miss Keane to become a disciplinarian again and Kate and the girls are beginning to regret what they did. Before Kate can confront her, Adelaide acknowledges that she has gone too far and is scaring people off. Kate finds a way for Miss Keane to be happy again.

Uncle Joe starts a Free Wedding and Honeymoon Contest to promote business for the Shady Rest Hotel. Out of all the entries, one stands out: that of Laura Bentley and Tony Allison, a young couple whose parents will not allow them to get married. However, when they arrive at the hotel, they are actually an elderly couple whose respective grown children objected to their marriage. Kate and the girls still want to give them the best wedding and honeymoon the hotel has ever seen. Laura's daughter Violet, and Tony's son Herbert, arrive just in time to stop the wedding. Kate tries a little reverse psychology to get the bride and groom back on track. Kate's ploy has an unintended consequence which threatens not only the wedding but Laura and Tony's relationship altogether. In the end, Laura and Tony get married along with Violet and Herbert. Note: This is the first one where Meredith MacRae plays Billie Jo.

While the girls are swimming in the water tower, a bi-plane flies overhead. The pilot, distracted by the beautiful girls he sees in the water tower, crashes the plane by the railroad tracks next to the hotel. The family manage to get the unconscious injured pilot up to the hotel. For all three girls, it's love at first sight. Each of the girls do whatever they can to gain Steve's favor while they nurse him back to health. Steve will do whatever he can to stay at the hotel as long as possible. Kate and the girls later learn that he is a crop duster. Uncle Joe believes Steve's a Russian spy. Steve tries to use Uncle Joe's belief to his advantage.

Steve's plane is still sitting damaged where it crashed near the railroad tracks by the hotel. Henry Sharp, from the finance company, comes by because Steve has missed a payment. Steve has barely enough money to repair the plane let alone make his regular payments. Trying to get Sharp to give Steve some time fail. Steve decides to cut corners in repairing the plane. Kate, the girls and Uncle Joe try to help him raise some money, which ends up not being easy. Sunday at church, Reverend Jones enjoyed Steve's singing so much, he starts a contribution drive. They raise enough money to fix the plane and Steve decides to stay in the valley.

Steve spends time individually with Billie Jo, Bobbie Jo and Betty Jo doing their favorite activities. Because of this, each girl believes that Steve has chosen her to be his girl. Meanwhile, Uncle Joe tries to talk Steve into starting Carson-Elliot Air Express. Steve has no intention on marrying anyone at this point in his life. Kate and Steve devise a plan to scare off each of the girls. But their plan almost backfires when it come to Billie Jo.

Since she is now in junior college, Bobbie Jo thinks she's all grown up. She decides to go to an all night party with her friends. Kate refuses to let her go to the all-nighter, despite Bobbie Jo telling her that all the other mothers are letting their daughters go. Kate learns that none of the mothers want their daughters to stay out all night. Kate says Bobbie Jo can stay out until 01:30 and the Cannonball will be ready to pick the girls up at that time. Bobbie Jo and all the other girls plan to stay out all night anyway. Bobbie Jo and the girls decide to go home, but Kate has a surprise waiting for her and the others on the Cannonball.

Charley and Floyd derail the Cannonball going around Deadman's Curve. They believe the reason for the derailment was that Floyd had removed too many of the railroad ties to stoke the engine. Uncle Joe calls the C&FW Railroad, who agree to pay the necessary $300 insurance deductible for the repairs. Homer Bedloe shows up and finds out that a railroad employee's negligence caused the accident which in turns means the insurance company will not pay. Kate comes up with a plan where she gets some valley residents to put up the money and become stockholders of the train. But the Hooterville residents, taking over operation of the Cannonball, demand so many changes that the train's crew decides to quit. Kate finds a way for everyone to get their money back and to have Charlie and Floyd back at their jobs.