The town is a buzz when news spreads that a new couple have moved into the area. The town is further intrigued when they discover one of the couple is a writer. But as is always in Mayberry, nothing is ever what it seems.
Aunt Bee arrives home from her cruise with the exciting new she is engaged to be married to the captain of the ship she was on. Some of the townsfolk express concerns about the captains real motivation.
The local school decides to institute a new driver education program. Everyone in the town council is very supportive, however the question of who will teach the students creates some interesting problems.
Millie has a girlfriend, Renee, visiting from New York who has recently broken up with a long time partner. Millie asks Sam to show her around and keep her busy. Unfortunately Renee interprets Sam's kindness the wrong way and begins to find herself attracted to him.
Mayberry gets an invitation to join a sister city program by the United States government. The citizens of Mayberry embrace the idea and arrange for a delegation from their Mexican sister city, Porto Bello to visit Mayberry.
Andy and Helen return to Mayberry for a visit and bring their new baby, Andy Jr. with them. They want to christen their child in Mayberry and want to have Sam act as Godfather. This hurts the feelings of Howard, Goober, and Emmett whom all feel they are more qualified. A somewhat unorthodox compromise is arranged.
Milie is given the opportunity to travel to New York City and be a model. She is excited and accepts the offer. Sam is happy for her but it isn't long before he starts to have misgivings and he's off to NYC himself.
Mike is planning on having a birthday party with no girls invited. His party falls on the same day as Sally's party...but she is inviting boys. The boys are all set to go to Mike's until Sally starts bribing them with great prizes.
Sam Jones has been chosen by the U.S. Department of Agriculture to participate in a Farmer Exchange Project with the U.S.S.R. The Russians are sending a professor to Mayberry to learn about American farming practices. When Sam travels to Mount Pilot to pick up the Prof. he is surprised to find a woman. She is very proper and reserved and Millie thinks she would have a good time at the dance on Saturday. Sam enlists Howard to escort her and try to bring her out of her shell.
Still vacationing in Palm Springs Sam bumps into an old war buddy named Charlie Harris. Charlie if a golf pro at one of the clubs and agrees to give Millie a few lessons. Charlie's a bit of a flirt and makes a pass at Millie. When she tells Sam he just laughs it off and Millie becomes furious. She believes she is being taken for granted and comes up with a plot to make Sam jealous.