Patty gets a crush on her new French teacher after he makes her his test subject.

While Patty is taking a test to determine the intelligence of today's students, the machine goes nuts and the results say Patty is a genius with a 185 I.Q.

Martin's Aunt Pauline comes to visit.

Ross is invited to his first dance, so Patty and Cathy try to teach him about girls.

Ross tape records conversations at Patty and Cathy's slumber party's, and then blackmails them with the tape.

When Mr. Lane refuses to pay for an evening gown for Patty, she decides to go into the babysitting business.

When the star basketball player's parents move to Michigan, the Lanes invite him to stay with them.

Patty and Cathy both run for president of the Girls' League.

Patty plays Patty and Cathy at a party, after Cathy got sick for having taken a flu shot meant for Patty.

The school is putting on a lavish version of Anthony and Cleopatra. Cathy tries out for the lead, but Patty unexpectedly gets it.

Cathy wants to win more friends, so she writes to Aunt Jane,a Lonely Hearts colunnist, for advice.

Richard enters Patty and Cathy's song in the Jimmy Dean Songwriter Contest. Unfortunately, Patty had copied the words from a book of poetry!!

Cathy falls in love with a foreign exchange student.

Christmas is a day away and Cathy anxiously awaits a visit from her father, only to learn that he is a prisoner in a foreign country.

Martin's brother Kenneth sets out to write his autobiography, but discovers writing a book to be more difficult than he imagined.

Patty become an astrologist in order to earn money to buy Natalie a birthday present.

When all the girls like the dress that Cathy made, she and Patty decide to go into business.

Patty writes a novel presenting the viewpoint of the American teenager and immediately gets a publishing contract.

Martin learns that he is being transferred to Paris.

Natalie makes the mistake of leaving her cake in the church bazaar on the kitchen table unattened.

Patty and Richard decide to go steady.

Natalie Lane begins to feel unwanted and devises a plan to get even with her family for the uncaring way they have been acting.

Cathy buys a vacuum cleaner for Natalie's birthday but finds the cost is too much for her to handle.

After flunking an exam for teenagers, Patty decides to enroll in modeling school.

To increase the circulation of the school paper, Patty uses scandalous stories which infuriate the school principal.

In order to buy a gift for his parents wedding anniversary, Ross enters Patty's photo in a teenagers beauty contest.

Patty receives some beautiful letters from a new pen pal, and therefore loses interest in Richard.

In order to impress Sue Ellen, Patty buys an expensive dress that she can't afford.

Patty discovers that she is allergic to Cathy.

Patty unknowingly signs papers to adopt a Korean orphan.

Richard decide to quit school.

In order to get elected chairman of the class prom, Patty promise to get Pinky Gristol "The Mop" as a guest.

Cathy, who is student principal for a week, has trouble dealing with Patty.

Patty gets a job at the local ice cream parlor.

Patty and Cathy reminisce about Cathy's arrival in the Lane household.