Marcia enters Mike in a "Father of the Year" contest through the newspaper. However, in order to do this she's had to sneak around. When Mike catches her and she's unable to explain, he grounds her from the family ski trip.

Carol is to sing in church on Christmas, but days before the event, she loses her voice. Later at the mall, a hopeful Cindy asks a Santa Claus to bring Carol's voice back by Christmas. Meanwhile, Alice and the kids find it a difficult task hiding Christmas gifts in the house.

After escaping the jail cell, the Brady finally arrive in the Grand Canyon and set up camp. Later, the family is thrown into a panic, when Bobby and Cindy get lost in the canyon while chasing and Indian boy.

Greg is furious when he discovers Marcia is dating Warren Mulaney, his arch rival who beat him out in a basketball rank. To get revenge, Greg begins dating the woman who beat Marcia out in cheerleading.

Convinced he doesn't have personality, Peter goes all out to try to get one. After imitating celebrities, Peter decides to try a funny personality in which he stocks up on jokes and plans to show his new personality off at a party.

When Marcia gets the lead as Juliet in the school play, she lets it go to her head, which causes her to become unbearable at home and at school and plays as the major reason why she is replaced by her understudy.

Tired of being in Marcia's shadow, Jan is determined to do something that Marcia never did. However, Jan becomes more depressed when she fails to make the pom-pom team and her friend makes the squad. Then she wins first prize in the essay contest and finds out her teacher made a mistake in scoring.

Greg wants to be on the football team, but Carol is against it, fearing that he's going to get hurt. Carol's fears come true when Greg fractures a rib. Meanwhile, Bobby gets a camera.

Marcia makes a promise that she will get Davy Jones to perform at the prom. A promise she quickly learns is going to be very difficult to keep, since trying to get a hold of him is almost impossible.

After taking the wrong bike from school and when her grades begin to slip, Jan learns she may need glasses. Meanwhile, Mike's anniversary gift to Carol is a portrait of the six kids. The trick is getting the kids to the photographer without Carol finding out.

Greg, wanting to make a record, books a recording studio and plans on singing a song with his siblings. However, when Peter's voice begins to change, his hopes of recording his planned song are dashed.

Jan discovers her Aunt Jenny looked exactly like her when she was young. Curious about how she looks now and thinking perhaps that is how she'll turn out to look, Jan asks her for a picture of her now. This causes Jan to become distressed since Jenny, now, doesn't look to attractive.

For a joke, Molly Webber, a plain Jane, is nominated for hostess on Banquet Night. This practical joke sends Marcia on a mission to transform Molly into a knockout and she succeeds but discovers she may have succeeded to much when she finds herself running against her.

Mike has to check on the construction of a building that his construction firm is building and it so happens the building is in Hawaii, so he takes the whole family along. However, ancient Hawaiian superstition begins to plague the family when Bobby discovers a ancient taboo idol that brings bad luck to those who touch it. Part 1 of three.

An archeologist traps the boys in the caves at the burial ground and takes them hostage insisting they tell him where they found the idol. Meanwhile, Jan, Marcia and Cindy debate on whether or not to tell Mike and Carol, the boys whereabouts when they fail to come back for dinner.

It's the beginning of another school year, and Marcia panics about becoming a freshman in school, going as far as pretending to be sick. However, after parents see through her act, they give her some advice, get involved and she does, joining every group or club available.

One afternoon, Jan brings her friend, Kerry home and introduces her to her family. Kerry quickly makes the biggest impression on Peter who wants Greg's advice on landing a girl. This leads to Greg playing Cyrano for Peter, however, Kerry mistakenly thinks Greg is the one who has feelings for her.

One evening, Jan and Cindy claim to have seen a ghost but is revealed to be a trick by Greg, Peter and Bobby. This leads the girls to use the same tactics the boys used to scaring them. However, things get out of hand when Alice becomes the target of the scare tactics.

The kids begin to give Alice the cold shoulder treatment 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.

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 Brady kids want to buy a silver platter for Mike and Carol's wedding anniversary but their short on money so they take to means to get enough cash. This leads them to put together an act and appear on a TV amateur contest.

Marcia has a big problem when she inadvertently makes two dates for the same night. One with Charlie and the other with Doug, the big man on campus. She makes a excuse to Charlie to go out with Doug but quickly learns Doug was only interested in having a pretty girl on his arm after Marcia is hit in the face with a football.

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.

As the Bradys are auditioning for a TV amateur show, a musical agent spies Greg and offers him the chance of becoming a solo star. This begins to worry Mike and Carol who hoped he would go onto college and angers his siblings for deserting them, since they were a group.

Greg has finally landed a date with Sandra but he will only be able to go out with her if he can get a date for her visiting cousin, Linda. He turns to the last resort, he gets Peter to wear a fake mustache and act as if he were an older man.