Ozzie and Harriet must decide whether to celebrate their 19th wedding anniversary with a night on the town or to stay at home and chaperon a party for Ricky.
Ozzie gets upset when the gravel Thornberry ordered is dumped in his yard instead. After a phone call, things get worse. Worse yet, Thornberry is down on his back and can't deal with the problem himself, which leaves only one person to take care of the mess.
Ozzie is bursting with pride when David is chosen over several boys as an usher at the local movie theatre. Ozzie's pride it tempered when he learns why David was chosen over the other boys.
Wally Dipple invites Ozzie and Harriet to his annual "Come-As-You-Are" party, and Ozzie does his best not to be caught in a robe and pajamas like last year.
After the Christmas gifts have been opened, one exception is noticed: Ricky's catcher's mitt. Ozzie guesses it might have been delivered to another Nelson family across town, as a package had before. They go there and find a poor, young widow with small kids. Ozzie, Harriet and the boys decide to give them a merry Christmas.
Ricky tries to teach an old dog new tricks. Meanwhile, Ozzie and Thorny take drastic measures to avoid going to a violin recital with their wives, in order to stay home and watch the big fight on television, instead.
As a favor to their wives, Ozzie and Thorny are to deliver sandwiches and potato salad to the women's club. They need to use David's car but he leaves with the food in the trunk. Ozzie takes Ricky's bike and Thorny is on skates as they try to locate the missing refreshments.
Ozzie tries to derail Thorny's scheme to save money by having his house painted with the paint that is leftover from painting Ozzie's home. Ozzie demands that Thorny paint his house a different color than his. Meanwhile, Ricky gets permission to express his individuality by redecorating his half of the bedroom he shares with David.
After hearing a speech at the women's club about exciting careers for women. Harriet starts to think about pursuing a career of her own, something "old-fashioned" Ozzie is dead against.
David is taking Susan to a fraternity party but he needs to find a date for her younger cousin Betty. David enlists Ricky as the escort and the Nelsons find laughs in getting Ricky ready for the dance. Ozzie is stumped on how to retrieve the tuxes from a closed dry cleaner.
A little girl is following Ricky around, everywhere he goes. When Ozzie & Harriet try to talk to her, she runs away. Ozzie, Harriet, David, Ricky & even Thorny are trying to figure out what she wants.
After Ricky has been coming home and hardly eating his dinner, Ozzie and Harriet become concerned. Ozzie sets up a charge account at the drugstore after Thorny sees Ricky in there possibly eating ice cream.
Ozzie's next-door neighbor, Thorny, has not taken piano lessons since he was nine years old, but he bets Ozzie he can learn to play a complete song within one week.
