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.
J.R. Castle leads Martin to believe that Patty and Richard are planning to elope. Acutally, they are helping Natalie plan a surprise vacation for Martin and her at the same fishing lodge where tjhey spent their honeymoon.
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' Leauge.
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 birtyday 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.
Richard is jealous of Groffrey Davis111, a military cadet in town for a visit.
Patty decides to take tuba lessons.
Patty is ghost-writing an advice column for the school newspaper;and craving lots of trouble for lots of people.
Patty,Cathy,and Ross form the UAFUM[United Association for Unproteced Miners] in the hopes of getting more privledge at hom
Patty accepts the challenge to live like a pioneer for one week.
Patty and Cathy both like their new next-door neighbor
Patty anbd Cathy campaign for T.J. Blodgett[Martin's boss], but discover that thery prefer his oppenent.
When Patty is invited to the Harvard Prom by Sue Ellen's cousin Rip, she decides to use psychology to persuade her parents to allow her to go.
Patty decides to join the Peace Corps.
Cathy falls for Chris, a new student, and seeks advice from Patty; Chris, meanwhile, asks Richard for help.
The hero of the football team is in love with Cathy.
Patty forms,""Patty Lane Inc."" in order to market Cathy's apricot jam.
Martin promises to take Patty to the father-daughter dance, but must cancel at the last minute.
Patty follows Martin's suggestion and volunteers to do a lot of things at home and at school; everyone else, however, ends up doing the work for her.
Patty and Sue Ellen vie for the attentions of Woodrow Warren Calden 111,a new student at school.
Patty witness an auto accident and thinks that one of the men is a robber.
Patty belives her parents are tring to marry her off to ayoung man whom they invite to dinner.
Cousin Betsy from Chattanooga comes to visit, captivating all the eligible young men.
Sal Mineo visits hie alna mater, and Patty is cast in a play opposite him; the night of the performance, she gets stage fright and cannot speak of her lines.
To raise money for a church bazaar, Patty raffles off Richards.
Patty and the Newpapers Game""2.3.65 Martin is distrubed when he thinks that a new reporter has been hired to replace him.
The Lanes have decided not to give Ross a suerprise party, buy he has already made plans for it.
Patty tries to help a British singing duo become successful.
The Lanes discovers that their home was used during the American Revolution and is therefore an historical landmark.
Patty is elected prom chairman and must get hold of a big-name star.
After styding genetic theory in school, Patty decides that Richard would not be a suitable father for her children.
Tha Lane house becomes a ""no-man's land"" of booby traps, thanks tp Patty and Ross.
After finding a composition[on Ross's desk] i which the author praises his sister,Patty decides to help Ross build a car for the soap box derby race.
Patty deserts Richards for Carlos, a boy who knows all the latest dance steps,so Richards begins dating Cathy.
Patty feels guilty when Martin complains that she doesn't spend enough time at home.
Cathy, writes a letter to the Chronical criticzing an editorial and calling the authora "" Man with the mentality of a dinossur.
Patty becomes a fols singer at a local coffee shop.
Patty tries to improve her cooking in order to impress Richard, who has grown fond of French food cooked by a girl named Gloria.
Ross tries out for the Little League, an everyone tries to help him.
Cathy becomes a heroine after rescuing a drowning baby.
Patty will get an extra week's allowance if she can refrain from talking for three days.
Frankie Avalon stops by the Lane house to make a phone call, and ends up spending a short time there because the airport is fogged in.
Patty falls for an attractive young doctor, and misunderstands his feelings for a boat as feelings for her.
When Richard goes to a party without Paty, Patty decides to give a party the same night.
When Richard's parents go out of town, Patty invites him to stay at the Lane house, but his personality and living style clashes with everyone else's.
Tha Lanes don't dare give Patty their true opinion of her op art creation.
Patty decides to give a shy girl lessons in self-confidence.
Patty becomes involved in the spy business when an Interpol agent visits the Lanes.
Patty is the only witness to a traffic ac cident involving Richard.
Patty decides to test Richards fidelity by posing as Cathy.
Patty has a slight temperature and is forced to stay home from school, against her will.
Ross tries to patch up the quarrel between Richard and Patty.
Martin checks into the hospital the same day that Patty starts work as a candy striper.
When a handsome young forestry students movies in next door, Patty takes a sudden interest in nature.
Cathy decides to apply to be an exchange student, and is very disappointed when the family doesn't stop her.
Patty gets a bright, new student at school to ""help"" her with her history paper.
When Martin puts a time limit on everyone's phone calls, the kids try to earn money to buy their own phone.
Martin and Natelie go away for the week-end, leaving Patty in charge. Trouble ensues when she and Ross becomes handcuffed together.
Martin uses a pocket-knife advertisement to show the family what for his birthday, but they read the wrong side and try to buy him a $99 rifle. 4
When Patty invites an out of work musician over for a meal, he decides to make the Lane home his permanent residence.
Patty promise her creative writing class that her father will appear as a guest speaker, but does not check with him first.
Patty patcher up a quarrel between Ross and the new boy in town because she is interested in the boy's older brother!
Patty takes care of a society columnist's French poodle.
The Captain of the football team asks Patty for a date.
As a assignment, Patty must write to a government offical. Problems arise when she chooses the President of the Soviet Presidium.
Patty has a date with an ""older man."" Due to a misunderstanding, Martin belives that she came home after the curfew he set.
Martin's Uncle Jed arrives the same night as Patty's formal dinner party.
Martin decides to teach Patty a lesson in responibility after she conceals the fact that she was not able to make an important bank deposit for Martin.
Three kittens cause some promblems in the Lane household.
Richard and Patty decide to get married after graduation from high school.
Patty asks Ross to do a favor for her and the new in town, in hope that he will ask her out, Patty, in return, tries to talk Martin into allowing Ross to drop French.
Patty agress to date the president of Tigers' basketball club in order to increase Ross's chances of becoming a member.
Patty belives that she has ESP.
Reunion Movie Special The original cast members from the classic television series resurrect their characters, including Patty Duke in her legendary dual role as identical cousins Patt and Cathy Lane. This time the family reconvenes in New York in order to surprise Patty, and end up battling her old arch-nemesis Sue Ellen, who is intent on having the high school torn down.
