When the family cleans out the attic, both Greg and Marcia realize what a great room it would be and they both begin fighting over who gets it. This leads to yet another battle between the sexes.

Both Bobby and Cindy have to opportunity to try out to be on a televised children's quiz show if they get a certain score on a written test. However, an overconfident Bobby doesn't study at all and fails while Cindy is chosen and her ego alienates the rest of the Brady kids.

Both Robert Reed puts in double duty as Grandpa Brady as does Florence Henderson when she portrays Grandma Hutchins in an episode where the Brady kids play matchmakers and try to get Grandpa Brady and Grandma Hutchins together. However, their efforts may all be for naught when an argument erupts between Grandma and Grandpa during a romantic dinner.

Peter's new detective kit comes in handy when Cindy touches and then loses a pair of antique earrings that Marcia was borrowing from Carol that she warned her not to touch. This leads Peter and Cindy on an all out search for the missing earrings.

Peter is elated over getting his first job in Mr. Martinelli's bike shop, repairing bicycles. However, when Mr. Martinelli has to fire him after 3 days for his slow work, Peter is unsure how to break the news to his family.

When Marcia breaks her date with a homely classmate to go out with Doug Simpson, the "big man on campus," her brothers accidentally hit her in the face with a football. As a result, when Doug sees Marcia not long after her accident, he promptly breaks their date.

The principal calls home to alert Mike and Carol to the fact that Bobby's playing Jesse James at school. This leads Mike and Carol to learn just how obsessed Bobby about his "idol" and try to dissuade him from worshiping a cold hearted killer.

The Brady kids want to buy a silver platter for their parents' wedding anniversary. But short on money, they perform on a TV amateur contest.

Bobby tells his parents that Greg nearly got into a freeway accident because he was reading the cover of a new record. Mike and Carol suspend Greg's car privileges for a week, but Greg has plans to take out his girlfriend Rachel. When Greg decides that his father's directive has a "loophole" and takes a buddy's car to procure rock concert tickets for the date, Mike really hits the roof and grounds him. Greg talks his way out of the severe punishment but is bound by "exact words" ... and it leads to a drive-in movie date that neither Greg nor Rachel will ever forget.

Bobby is crestfallen when he is picked to be safety monitor at school. But with Mike's and Carol's encouragement, Bobby becomes determined to do the job well but goes overboard, becoming the most unwelcome person both at school and at home.

When the family dentist, Dr. Vogel, asks Mike if Marcia would be interested in babysitting his kids, Marcia misinterprets the request as a date.

Peter is determined to get the part of George Washington in the school play, but the teacher thinks Peter would be better in the role of Benedict Arnold. When his friends start making snide comments about it, Peter decides to get himself kicked out of the play.

Greg is crazy for his latest girlfriend, Jennifer, but things get difficult for him when he learns that both Jennifer and Marcia are competing for head cheerleader -- and he just happens to be one of the judges.

The kids give Alice the cold shoulder after she reveals that Greg and Peter broke an antique lamp of Carol's. The girls join the bandwagon when Alice innocently tells Carol that Marcia left the stereo on all night. Feeling unwanted and no longer needed, Alice quits.

In a paper for English class, Greg writes about wanting to follow in his dad's footsteps and become an architect. When Mike reads the paper, he enthusiastically encourages his son, but Greg is uninterested. Meanwhile, Peter and Jan also explore careers.

Fed up with the number of people in the household, Jan voices her desire to be an only child. The other kids oblige and treat her that way, but Jan changes her tune when she's excluded from the other kids' activities.

The high school puts on a "Family Frolics" show, with Marcia and Carol performing a routine together while Greg and Mike team up for their own.

After Jan and Cindy are spooked by a trick ghost rigged by the boys, the girls try to retaliate. But things get out of hand when Alice becomes a victim of their attempts to spook their brothers.

Smitten with Jan's friend Kerry, Peter seeks Greg's advice on landing a girl. This leads to Greg playing Cyrano for Peter, but Kerry mistakenly thinks Greg is the one who has feelings for her.

It's the beginning of another school year, and Marcia panics about becoming a freshman, going as far as pretending to be sick. However, after her parents see through Marcia's act, they encourage her to get involved -- but she joins every club available.

An archeologist (Vincent Price) traps the boys in a cave and takes them hostage, insisting that they tell him where they found the idol. Meanwhile, Jan, Marcia and Cindy debate whether to tell Mike and Carol about the boys' whereabouts when they fail to come back for dinner.

During a surfing competition, Greg wears Bobby's tabu idol and wipes out. Soon after, Greg, Peter and Bobby learn of the ancient superstition from a construction worker, Mr. Hanalei. This leads the boys to search for an ancient burial ground in which to return the idol and break the curse. However, they are unaware of a shadowy figure (Vincent Price) trailing them in the cave.

When Mike is informed by his boss that he needs to go to Hawaii to check on the progress of a project he's working on, the family is able to go as well. Upon arriving on their family vaction, Bobby stumbles upon a taboo tiki that ultimately starts bringing bad luck to everyone who touches it.