Mike has the job of recruiting some campus models for a fashion show and when a gorgeous store representative stops by to give him help, he forgets there are any other girls in the world. With Robbie's help, he tries hard to capture her affections with displays of serenading on the guitar.

Chip and Ernie, having heard two scientists calculate that the world will be destroyed in one week are faced with the classic problem of what to do in the time they have left.

Political overtones arise in the Douglas house when Steve becomes escort to a visiting congresswoman. Meanwhile Chip must entertain a small girl who aims to be class president -- even though Chip is campaigning to be.

Robbie follows the fad and buys an antique aircraft to impress his new girlfriend. Steve lets him go ahead with trying to restore it, convinced it will never fly but as it becomes more airworthy, Steve becomes concerned.

Robbie's friend has a grandfather that trains horses, but on the day of the big race when the thoroughbred racehorse loses her mascot, a rabbit, she loses her speed. But once she hears Robbie serenade on the guitar, the mascot problem is solved.

Steve is having nightmares and his vision of the future has a computer named Betsy join the family. It interferes with wedding plans when it selects different mates for Mike and Sally. Hoping to prove the computer wrong, Mike decides he will have Steve fill out a questionaire for his dad and his mother. His reasoning is that they will submit the two forms and the computer will pick someone else for their perfect match, thereby proving to Sally how wrong the computer can be. But lo and behold the computer mates Steve and Mike's mom.

An escaped circus lion makes a midnight call at the Douglas house, and Ernie sees it and awakens the understandably skeptical Steve who accompanies his new stepson to investigate. Steve eventually sees the lion and nervously plays a game of tag with it, warning the family to keep their bedroom doors closed.

Robbie Douglas is practically engaged to his girlfriend Joanne, and when they discover how their friends are both successfully attending university while raising a baby they begin to think that perhaps teen-aged marriages are workable.

Two tomboys - a pretty lady engineer named Max and a member of the girls Hockey team named Georgie prove tough to handle for both Steve and Chip. Hoping to become a hero to his peers, Chip goes out for the girls hockey team when Georgie insists the coach must let her join the boy's track team.

Uncle Charley puts down a deposit on a vacation lot at beautiful Whispering Pines, only to learn he's been hoodwinked in a high pressure real-estate operation. The family discover that it is located at the bottom of a steep canyon. It is next to a tumbledown shack, occupied by a slovenly family who prove themselves completely undesirable as prospective neighbours.