Episode list

Patty's European cousin Cathy comes to America to live with the Lane family.

Patty falls for her substitute French teacher.

Patty inadvertently alters a computerized IQ test. As a result, she is mistakenly categorized as a genius.

Martin mistakenly believes that the family is trying to hide the fact that Patty and Richard are going to sneak off and get married. But Cathy's hiccups give them away.

Crotchety Aunt Pauline comes to the Lane household for her annual visit. Things seem to be going as good as can be expected until Aunt Pauline has a confrontation with Cathy over the way her father has been raising her.

A girl invites Ross to his first party but Ross is hesitant to go. Patty and Cathy get involved but will that change Ross' mind?

Patty and Cathy have a slumber party at their house for some of their girlfriends. The Richard, Henry, Tom and another boy show up at the door, before the party starts. Little brother Ross tapes the girls' conversations during the party and uses it for blackmail against Patty and Cathy. The two cousins end up doing his chores, to keep Ross from playing the tape to others, and wait on him constantly. Patty and Cathy turn the table on Ross and everything works out fine in the end for the entire Lane family. All info I have submitted is from the credits listed during the show and from watching the show.

In an effort to raise enough money to buy a new dress, Patty enlists Richard and Cathy to help run her new babysitting, or tot tending, service.

Cathy helps Brooklyn Heights high school's best basketball player prepare for a class test. If he fails he will be ineligible for the big game.

Patty and Cathy unknowingly nominate each other for President of the Girls League. What begins as a friendly rivalry turns into a battle of wills, and some dirty campaigning.

Through no fault of their own, Cathy accidentally gets the flu shot that was meant for Patty. Cathy's reaction to the shot causes her to miss the dance party later that night, so Patty decides to pull a double shift so Cathy won't lose her boyfriend.

At an audition for a school play, Patty inadvertently steals the part of Cleopatra from Cathy, who becomes her understudy. Meanwhile, Patty arranges for a Hollywood talent scout to view the play, but her plans are jeopardized when she develops laryngitis. Cathy dutifully fills in for Patty, but Patty has other ideas after she makes a last-minute recovery.

After feeling like a wallflower at one of Patty's parties, Cathy asks a newspaper columnist how she can be more popular. Cathy tries hard, but the results are not what she expects.

In order to win Richard back, Patty, on the advice of her mother, decides to write a poem. After having no luck writing one on her own, Patty finds a poem in a book and gives that one to Richard. Everyone thinks that Patty wrote the poem and it's not a problem until Cathy puts the words to music and Richard decides to enter the song into a TV contest.

Patty and Cathy compete for the attention of a visiting foreign student. The student becomes enamored with Cathy and asks her to marry him.

Martin is forced by his boss to fire his twin brother, who is also Cathy's father, at Christmas time.

Now that Uncle Kenneth (Cathy's father) has made it home and been fired from his job, Patty and Cathy scheme to get him rehired.

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.

A French teenager writes a best-selling book. Patty thinks she can do the same in America. An unscrupulous book publisher gets involved.

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.

Natalie begins to feel unappreciated at home. And the advice she gets from her friend seems to make matters worse.

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.

Patty finds a pen pal through the newspaper and soon decides that her new pal is superior to Richard.

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.

Patty gets an expensive dress for a school dance. But before Patty can pay for it Cathy borrows the dress, with disastrous results.

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.

Richard decides to drop out of high school, and Patty, in turn, decides to drop him.

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 has an opportunity to work at the shake shop. At first she is enthusiastic about the money, but the work itself begins to wear on her.

Patty and Cathy reminisce about the time when Cathy came to live with the Lane family.