Both Greg and Marcia rush home after school with the news that they're both running for student body president. May the best candidate win, as the boys and girls each take sides and soon each one of them is accusing the other of sabotage. Later, rudeness and apathy abound as each candidate rehearses their campaign speech, leading to a stern lecture from Mike about family unity and how they will be a family far longer than either Greg or Marcia will be class president. It's a speech that Greg take seriously when he fires his campaign manager for recommending that they spread a lie around school that Marcia was seen in the balcony of the local movie theater with an older boy. Marcia (who witnessed the exchange without Greg knowing it) realizes that, while Greg is indeed intensely competitive, he also has integrity and will stick up for his siblings ... and then understands that Greg is the best for the job after all.

When all of the kids come down with the measles, Carol and Mike call their respective doctors – the girls' doctor is a woman, and the boys' doctor is a man – and the kids are refusing to see the other's respective doctor. As a result, both doctors decide to combine their practices in order to better serve the Brady family.