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.

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

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.

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

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.

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.

June bakes a special cake for Dave, in hopes he'll remember the first anniversary of his marriage proposal.

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.

Ricky wants to turn in his old train set in for a new chemistry set.

Doc Williams is selling a fancy sportscar, and Ozzie is tempted to buy it.

David treats his parents and date to dinner at an upscale restaurant, but it's possible he may not have enough money to cover the tab.

David invites a pretty Spanish girl to a dance knowing she doesn't speak a word of English, but doesn't count on her bringing her duenna as a chaperone.

David, Wally, and Chuck take over management of the campus hot dog stand.

Ozzie makes a fishing lure out of a feathered ornament from Harriet's new hat.

If Dave and Rick don't return their dates to the dorm by eleven o'clock, they will be locked out by their strict housemother.