After a few horoscope predictions come true, Patty sees this as an opportunity to make a few quick bucks to help buy a birthday present for her mom. As business booms, she enlists Cathy to "double" their profits.
When a dress made by Cathy becomes a hit at school, Patty decides to market the dresses to a wider audience. Soon, however, the difficulties of owning a growing business become all too real.
Martin's newspaper reassigns him to the Paris bureau for a year. At first the entire family is enthusiastic about the trip. But the enthusiasm begins to wane when each family member realizes what they are leaving behind.
Patty and Cathy accidentally eat a cake that Patty's mom had baked for a contest. Even though they lack any baking skills, the pair, along with Ross, decide to make a replacement cake.
Patty accepts Richard's ring and they both decide to go steady. Both of their families think they are too young to steady so they conspire to change Patty and Richard's minds.
Cathy gets in over her head when she purchases a vacuum cleaner from a door to door salesman. Patty steps in to help but soon both of them end up on the wrong side of the law.
Patty takes a test in a magazine to see how good of a teenager she is. Her self-confidence plummets when she fails the test, so she decides to take a modeling class to try to regain her confidence.
Patty becomes editor of the school newspaper. Seeking to get a quick increase in readership she avoids modelling the paper after her father's and instead goes the tabloid route.
In order to win a prize for their parents' anniversary, Ross enters Patty into a Beautiful Teens contest. Patty initially declines but later decides to help her brother. But her only chance at winning is with Cathy's help.
Shortly after Cathy receives a present for doing well on a test, Patty begins uncontrollable sneezing whenever she gets near Cathy. The family believes the sneezing is a psychosomatic result of Patty's jealousy of Cathy, while Cathy thinks it's because Patty hates her.
As part of a school project, Patty becomes a foster parent for a Korean boy. Amongst all of the paperwork she signs is, unbeknown to her, an adoption form.
After Patty is put in charge of the school prom she poses as Cathy in order to get Cathy's old school friend, who has become a pop star, to perform at the dance.
Cathy is chosen to be student principal for the week. As part of her duties she is assigned to teach a class. In that class Patty begins to disrupt things and Cathy has no choice but to reprimand her.
Patty, with Cathy and Ross, organizes a union in order to get more benefits around the house. So Martin and Natalie decide to form a union of their own.
Patty gets invited to a college prom but her parents won't let her attend. Taking Cathy's advice, she decides to use a little psychology to get her way.
While Cathy is considered the front runner for student of the year, Patty, acting on the advice of her father, decides to take on more responsibilities at school. Her actions increase her chances at becoming student of the year.