Hoping to find hidden treasure, Ozzie and Joe purchase a locked mystery trunk at auction.

David and Ricky's fraternity decides to throw a Christmas party but there's no piano to be found.

Ozzie and Joe make a bet with their wives that they can prove men have greater extra sensory perception than women.

David holds his fraternity rush party at the Nelson home and the other members of the family try to stay out of the way.

In David's absence, Ozzie and Harriet decide to deliver some important papers for his boss.

While Dave and June are on their honeymoon, Harriet decides to unpack their wedding gifts and fix up their new apartment.

Mrs. Bradford, a long-time client of Dave's boss, Mr. Kelley, wants to sue a local bakery. She claims they stole her favorite cake recipe.

Rick gets hired as a law clerk at David's firm when the work starts piling up.

Thoughts and dreams of Tutti-Frutti ice cream prompt Ozzie and Darby to embark on an all-night quest in search of the flavor needed to satisfy their craving.

When the women's club takes over a gas station one weekend for charity, Ozzie, Darby and Joe are sure they'll be sweet talked into helping, and resolve to refuse.

David gets his briefcase mixed up with that of someone else.

With the help of Bruce, Dave schemes to secretly sell Rick's old drum set to a pretty girl, who both he and Rick want to meet and ask out on a date.

David is in an ocean of trouble with June when he goes missing with a beautiful mermaid.

Ricky and Wally thow a surprise birthday party for the college dean of students in hopes of getting him to rescind his ban on fraternity dances.

Wally Dipple invents an unusual garage door opener. Ozzie and Thorny want to invest in it, but their plans hit a little snag.

The Tommy Jackson Band is coming to town, and Ricky dreams of sitting in on drums.

David trails a man whom he believes is faking an injury in order to collect insurance money.

It's time for the Campus Queen contest and Rick gets assigned to count the ballots.

Dressed only in pajamas, Ozzie and Thorny embark on a bizarre adventure.

Ozzie and Harriet wind up as babysitters so that young people can attend a dance being held by David and his fraternity brothers.

Wally asks David to write him a letter of recommendation for a job but David can't think of anything good to say.

Ozzie is on the spot when Clara introduces him as Joe to a visiting friend.

June volunteers David's services as a pie taster for a TV cooking show but can he pick out his wife's pie?

While discussing The Rover Boys' books with Thorny, Ozzie takes off to check out a book at the library, hoping to prove Thorny wrong. But when he's caught with a big book, one of his boys' teachers is convinced he knows a lot about the Peloponnesian War and asks him to lead a book discussion. Ozzie is just too proud to admit the truth and decides to learn everything he can before the PTA meeting.

When one of Ricky's Christmas gifts cannot be located, the entire Nelson family's holiday spirits plummet. However, the ensuing search enables the family to demonstrate the true spirit of Christmas.