It's the Prince and the Pauper when Bub exchanges jobs with an actress friend. She wants a family live, and he wants the thrill of the stage. As they try out their new roles, the realize things aren't always what they remember.
Steve is surprised when he gets a visit from a princess. She is Princess Joanne, and it happens to be his high school girl friend who grew up and married into royalty. She invites the family to dinner.
Steve meets a magazine editor and wants to ask her out on a date. As she is hard to reach, he enters the magazine contest for distinctive homes, hoping she will be the one to visit. Unfortunately, she sends her secretary to view the home.
Robbie's English class proceeds to run roughshod over an attractive young substitute teacher when their regular teacher becomes incapacitated. Frustrated and exasperated, the sub pays a visit to the lady she's filling in for and asks for advice. Meanwhile, Robbie gets an earful at home from both Steve and Mike after Mike recognizes her name.
Mike goes to South America with a friend in the Air Force Reserves to help in a disaster area. He encounters a young girl who needs an operation, and he is determined to raise the money for her. Chip helps a woman in town with her chores.
A Hollywood producer visiting Bryant Park sees Tramp and things he would be great for the animal lead in a movie he is making. Bub, Robbie and Chip fly out to Hollywood with Tramp so he can do an audition.
Mike & Robbie, aspiring songwriters, go against the odds and travel to New York to present a song they wrote to a big-time record producer. A New York cabbie helps them in the big city, and they reach their destination. Although the producer doesn't want the song, he gives the brothers some real-life, solid advice, and they go home all the wiser for the adventure.
Steve is asked to take in a boy who is a delinquent. When Steve has to be out of town that week, it is Bob and the boys to handle the visit. When someone comes to the house, they assume it is the delinquent.
Rob gets a summer job on a cruise ship going to the Caribbean. Turns out, Steve takes the same ship for a business trip to establish business with a new company. Both Rob and Steve find a way to have fun while working.
Sally and Mike are getting ready for her bridal shower. They want to receive practical gifts that will fill their kitchen and workspace. Bud thinks the shower show reflect a romantic theme and the gifts should highlight love.
Ernie & Chip have a Cub Scout adventure planned for the weekend, doing a moose patrol, which Steve is supposed to lead. However, Steve forgets, and brings home a business associate so they can work on a project together.
Steve is asked to escort a congresswoman when she is in town. For Chip, he is asked to be friends with a shy girl at school who is campaigning to be the class president. Chip is also campaigning to be the class president.
Jean Pearson returns to Bryant Park for a visit and calls the Douglases, looking to reconnect with Mike. They meet and as they reminisce, Mike's feelings for Jean are rekindled and he can't bring himself to tell her he's engaged to someone else. Unaware that Jean doesn't know this, Robbie spills the beans, prompting Jean to tell Mike she has to hurry home. They bid each other farewell, this time for good.
The owner of the Lotus Blossom restaurant is thinking of returning to Hong Kong. Steve enjoys eating at the restaurant so he tries to convince her to stay, telling her all the great things to do in America.