In the series opener, Mike Brady, a widower with three boys, marries Carol Martin, a widow with three girls. Just as the minister says "I do" the boy's dog, Tiger gets loose and chases the girl's cat through the wedding party. Chaos breaks loose which prompts Carol and Mike to yell at their kids to control their pets. Guilt over yelling at their kids comes into play later during Mike and Carol's honeymoon.

An article in an advice column, Dear Libby, draws Marcia's attention. In the article, an anonymous person is in the same situation as Mike and Carol is in and this particular person is unhappy. This leads Marcia to draw the conclusion that Mike or Carol wrote the letter. She later shows the article to the other kids and they devise a plot to keep their newly formed family together.

Cindy has been cast as the fairy princess in the school play. She's excited that her mom and new dad will be able to see her in the production until she learns she can only invite one parent. Torn between who she should choose, Cindy fakes an injury to get out of being in the play.

No longer feeling needed around the Brady household, Alice makes up a story about an ailing aunt in Seattle in order to leave. Later the family finds out the truth and put "Operation Alice" in effect in an attempt to make her stay.

Jan comes down with a mysterious allergy and Carol and Alice try to determine just what is causing it. They deduce that the cause is Tiger, the family dog. Or is it?

With more and more of the girls belongings being moved over from storage, the boys become fed up and take to their 'No Girls Allowed' clubhouse in the backyard which sparks the first of many battles between the sexes. This leads the girls to try to build their own clubhouse.

When Cindy's doll, Kitty Karry-All turns up missing, she accuses Bobby. This leads to a mock trial with Alice as the judge to determine Bobby's guilt or innocence. Then later Bobby's kazoo turns up missing and he blames Cindy.

Mike and Carol prepare for a family camping trip. However, the boys are not thrilled that the girls will be coming along. Meanwhile, the girls aren't exactly thrilled about sleeping in the wilderness. Later on the trip, things go awry when the girls mess up the boys fishing plans and freak out when they hear owl hoots.

With nine people in the house, Mike gets frustrated when he can never get any time on the phone for himself. He decides to install a second phone line, but that only makes the problem worse. Thanks to one of Alice's ideas, Mike decides to install a pay phone in the family room.

After watching "Cinderella" on TV, Bobby becomes concerned about stepmothers—especially since Carol asks him to sweep out the fireplace. Soon after, feeling worthless, Bobby decides to run away.

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.

Carol is to sing in church on Christmas, but days before the event, she loses her voice. Later at the mall, a hopeful Cindy asks a Santa Claus to bring Carol's voice back by Christmas. Meanwhile, Alice and the kids find it a difficult task hiding Christmas gifts in the house.

Peter comes home from school with the measles, so naturally, Carol calls the doctor, her doctor, who happens to be a woman. Meanwhile, Mike calls his doctor, a man. Soon all the kids come down with the measles and the household is in an uproar in yet another battle of the sexes, as the girls want a female doctor and the boys want a male doctor.

Marcia enters Mike in a "Father of the Year" contest through the newspaper. However, in order to do this she's had to sneak around. When Mike catches her and she's unable to explain, he grounds her from the family ski trip.

The Brady family learns that a trading stamp company is going out of business. A fight breaks out over who should get all of the saved stamps, the boys or the girls. If the girls get them, they'll buy a sewing machine and if the boys get them, they'll by a rowboat.

The day after Carol reads Mike's horoscope, which states "a strange woman will enter your life tomorrow," Beebe Gallini enters Mike's office and proves to be a most difficult client. Soon, Mike finds himself spending more time at the office than at home with Carol and the kids.

When Greg begins constant daydreaming and his grades start to drop the Brady's quickly think something is wrong. They soon deduce he has puppy love, for a certain girl named Linda. However, they are having an incredibly hard time finding the right Linda but soon the Bradys quickly learn just who this Linda is.

One afternoon, Bobby briefly leaves Tiger unattended and returns to find him missing. Soon a city wide search is on. Meanwhile, a string of burglaries in the neighborhood has Alice paranoid. Could the robbers have lured Tiger away in order to rob the Brady house?

Carol is out of town visiting her sick Aunt Mary and Alice is all prepared to take care of the Brady home. However, she sprains her ankle, after tripping on Chinese checkers, putting Mike and the kids in charge of the household duties. Meanwhile, her boyfriend Sam finds himself in a dilemma over whether or not to take someone else to the upcoming Meatcutters Ball.

Marcia is distraught after getting braces and becomes convinced she's ugly. This compounds when her boyfriend Alan breaks their upcoming date, thinking it's due to her braces. Meanwhile, the Brady kids try their best to make Marcia not feel so self-conscious but with little success.

While shopping at Driscoll's Toy Store, Peter looks up to see a wall about to fall on a little girl. He quickly pushes her out of the way. This leads to immediate media attention and Peter is named a hero. However, Peter lets all the attention go to his head, annoying his friends and his brothers and sisters.

Marcia's sense of security is shattered when Cindy inadvertently gives away her diary to a book collection. Marcia is especially concerned since in it, she confessed a secret desire for Desi Arnaz, Jr.

With constant complaints about the size of the house bombarding Mike and Carol, Mike puts the house up for sale and looks into buying a new one. Immediately after this, the Brady house seems to be haunted.

Mike and Carol switch roles for a day in order to prove a day with the opposite sex involves much less work. Their duties: Carol must help the boys with baseball practice and Mike must help Marcia with a cooking badge.

Jan receives a mysterious locket in the mail with no indication of who sent it. While the Bradys are trying to figure out who sent it, the locket mysteriously vanishes.

Don Drysdale's tips for Greg on his baseball playing go to his head. Which leads to Greg deciding to not go to college and he even starts to think about dropping out of high school.

Mike and Carol decide to allow Greg and Marcia babysit for the younger Bradys one evening when they go out for the evening and Alice is out with Sam.

Mike and Carol agree to allow Marcia to have a slumber party and the boys are thrilled because then they'll be able to play tricks on everyone. Then when Marcia gets into trouble at school, the slumber party is canceled.

Greg's history project is a home movie about the pilgrims with the rest of the Bradys clan as the cast. However, soon the other Bradys take over and pretty soon Greg loses control of his project.

Marcia has a crush on a boy who doesn't even know she's alive, at least not until she studies up on his favorite hobby, insect collecting.

Greg gets his first job as an office boy at Mike's architectural firm. However, he places his job in jeopardy when he carelessly loses some important designs.

While playing football in a vacant lot with Greg and Peter, Bobby discovers a wallet containing $1,100. When the girls learn about the boys' coup, they decide they want a cut of the money; this leads to yet another fight in the Brady household.

A bully named Buddy Hinton has been making fun of Cindy's lisp. So in order to defend her, Peter tries to learn how to defend himself.

Clark Tyson, a boy that Jan has a crush on, likes older girls, especially Marcia. This leads Jan to make up an imaginary boyfriend, George Glass.

Cindy has become somewhat of a tattletale leading Alice to get in a fight with Sam and the other siblings leaving her out of their activities.

When Bobby falls from a tree and sprains his ankle, he devolops a fear of heights. This prompts the Brady family to try to cure his fear.

Peter breaks Carol's favorite vase on the eve of a camping trip that he's looking forward to. So in order for him to go on the trip, the other Brady siblings unknowingly each confess.

Jan's practical joking puts Greg's science project, a mouse named Myron, in mortal danger when he gets loose allowing Alice to catch a glimpse of him which leads to her calling the exterminator.

Jan and Cindy catch Greg smoking with some friends. This leads to them telling Marcia who in turn tells Mike and Carol.

Tired of being the middle blond girl of the family, Jan tries to alter her appearance by buying a black wig, which she intends to wear to a friend's upcoming birthday party.

When Bobby gets a set of drums he drives the family up the wall. Meanwhile, Peter is made fun of for being in the glee club by his football teammates.

Mike's boss, Mr. Phillips, invites him and his family on a fishing trip on his boat. However when Cindy comes down with tonsillitis, the trip is postponed. Tonsillitis quickly claims another, when Carol also must have her tonsils taken out.

Greg, tired of the antics of his younger siblings, thinks he should have his own room. Mike allows Greg to turn his den into his own room. This also leads to Greg dressing a whole new way and talking a whole new way, including calling his parents by their first names.

A reporter interviews Marcia and asks her about her views on Women's Lib. This leads to her joining Greg's Frontier Scouts to try to prove a woman can do anything a man can do.

After witnessing a magician performing a disappearing act, Cindy refuses to sleep with the lights off. Meanwhile, Peter begins to develop a magic act and a reluctant Cindy agrees to be his assistant.

After discovering he is the only Brady without a trophy, Bobby enters numerous contests in order to win one. Including, selling magazines and a televised ice cream eating contest.

The Brady family goes all out to try to save a neighborhood park from being built on. This puts Mike's job in jeopardy since his company is the firm in charge of the construction.

An old boyfriend of Alice's, Mark Millard, comes to town and begins to wine and dine her, unknown to her he has other intentions in mind.

Carol is secretly writing an article about life with the Brady Bunch for Tomorrow's Woman Magazine. But soon after sending the article in, she gets a rejection letter.

The Bradys set out for a family vacation to the Grand Canyon. However, en route, the family stops in an old ghost town where an old prospector locks them in a jail cell.

After escaping the jail cell, the Brady finally arrive in the Grand Canyon and set up camp. Later, the family is thrown into a panic, when Bobby and Cindy get lost in the canyon while chasing and Indian boy.

Bobby and Cindy find their way back to camp bringing relief to a worried Mike and Carol. However, Bobby and Cindy's wanting to help the Indian boy, Jimmy, in his quest of running away to become an astronaut gets them into more trouble.

Greg buys his first car for $100 from his friend Eddie who made the car into something it's not. Finding that he has been stuck, Greg attempts to do the same thing Eddie did, when he tries to sell the car.

Greg is furious when he discovers Marcia is dating Warren Mulaney, his arch rival who beat him out in a basketball rank. To get revenge, Greg begins dating the woman who beat Marcia out in cheerleading.

Convinced he doesn't have personality, Peter goes all out to try to get one. After imitating celebrities, Peter decides to try a funny personality in which he stocks up on jokes and plans to show his new personality off at a party.

When Marcia gets the lead as Juliet in the school play, she lets it go to her head, which causes her to become unbearable at home and at school and plays as the major reason why she is replaced by her understudy.

A commercial producer discovers the Brady family while they are grocery shopping, one afternoon. He quickly wants them to be in a laundry soap commercial and soon the problem is whether or not to do the commercial since they don't use the product.

Peter begins to secretly eavesdrop in on his siblings private conversations with the help of Mike's tape recorder. This cause sibling rivalry and discord between his brothers and sisters.

Tired of being in Marcia's shadow, Jan is determined to do something that Marcia never did. However, Jan becomes more depressed when she fails to make the pom-pom team and her friend makes the squad. Then she wins first prize in the essay contest and finds out her teacher made a mistake in scoring.

Greg wants to be on the football team, but Carol is against it, fearing that he's going to get hurt. Carol's fears come true when Greg fractures a rib. Meanwhile, Bobby gets a camera.

Marcia makes a promise that she will get Davy Jones to perform at the prom. A promise she quickly learns is going to be very difficult to keep, since trying to get a hold of him is almost impossible.

After taking the wrong bike from school and when her grades begin to slip, Jan learns she may need glasses. Meanwhile, Mike's anniversary gift to Carol is a portrait of the six kids. The trick is getting the kids to the photographer without Carol finding out.

When Bobby and Cindy are not invited to a wedding because they're too young, they set out to do something important. Their goal, break a teeter-totter record.

Bobby becomes extremely self conscious about his height and tries different ways to make himself "big." First he tries stretching himself, and then he decides to improve his mind by memorizing a bunch of worthless facts.

Greg, wanting to make a record, books a recording studio and plans on singing a song with his siblings. However, when Peter's voice begins to change, his hopes of recording his planned song are dashed.

Jan discovers her Aunt Jenny looked exactly like her when she was young. Curious about how she looks now and thinking perhaps that is how she'll turn out to look, Jan asks her for a picture of her now. This causes Jan to become distressed since Jenny, now, doesn't look to attractive.

Bobby bets Greg that he can't do twice as many chin-ups as him. Greg, confident he'll win sits back while Bobby practices. However, Greg is totally unprepared when he looses and Bobby begins taking advantage of the terms of winning.

Peter is popular with his classmates when they find their names in his newspaper column. When he starts getting a poor grade he decides to improve it by flattering his teacher.

Alice has decided to take a well deserved vacation, but feeling like she's deserting the Brady family, she calls in her cousin, Emma. The Bradys are in for a big surprise when she turns to household into an army barracks.

Feeling immature because she is the youngest, Cindy feels that she isn't appreciated until she gets a mysterious letter from a secret admirer.

For a joke, Molly Webber, a plain Jane, is nominated for hostess on Banquet Night. This practical joke sends Marcia on a mission to transform Molly into a knockout and she succeeds but discovers she may have succeeded to much when she finds herself running against her.

Carol is in a car accident with a man who agrees to pay the damages. However, a short while later, he changes his mind and Carol finds herself summoned to court with Bobby and Cindy testifying against her.

Mike has to check on the construction of a building that his construction firm is building and it so happens the building is in Hawaii, so he takes the whole family along. However, ancient Hawaiian superstition begins to plague the family when Bobby discovers a ancient taboo idol that brings bad luck to those who touch it. Part 1 of three.

During a surfing competition, Greg wears Bobby's taboo idol and "wipes out". Soon after, Greg, Peter and Bobby learn of the ancient superstition from a construction worker, Mr. Hanalei. This leads the boys to search for an ancient burial ground to return the idol to break the curse. However, when they arrive at the burial ground, they are unaware of a shadowy figure trailing them.

An archeologist traps the boys in the caves at the burial ground and takes them hostage insisting they tell him where they found the idol. Meanwhile, Jan, Marcia and Cindy debate on whether or not to tell Mike and Carol, the boys whereabouts when they fail to come back for dinner.

It's the beginning of another school year, and Marcia panics about becoming a freshman in school, going as far as pretending to be sick. However, after parents see through her act, they give her some advice, get involved and she does, joining every group or club available.

One afternoon, Jan brings her friend, Kerry home and introduces her to her family. Kerry quickly makes the biggest impression on Peter who wants Greg's advice on landing a girl. This leads to Greg playing Cyrano for Peter, however, Kerry mistakenly thinks Greg is the one who has feelings for her.

One evening, Jan and Cindy claim to have seen a ghost but is revealed to be a trick by Greg, Peter and Bobby. This leads the girls to use the same tactics the boys used to scaring them. However, things get out of hand when Alice becomes the target of the scare tactics.

Marcia and Greg's high school is putting on Family Frolics activity which is a type of variety show with the students and their families providing the entertainment. This leads Marcia to talk Carol into performing a routine with her while Greg and Mike collaborate on their own.

Jan is fed up with the number of people in the household and voices her want to be an only child. So the other kids oblige and give her all the space she wants and she finds that she has more space than she needs or even wants when she begins to excluded from the other kids activities.

In a paper for English class, Greg writes about wanting to follow in his dad's footsteps and become an architect. When Mike, reads the paper, he is ecstatic and goes all out encouraging him unknown to him Greg just picked whatever career to write the paper. Meanwhile, Peter and Jan also explore careers.

The kids begin to give Alice the cold shoulder treatment after she reveals that Greg and Peter broke an antique lamp of Carol's. The girls join the bandwagon when Alice innocently tells Carol that Marcia left the stereo on all night. Feeling unwanted and no longer needed, Alice quits.

Greg is crazy for his latest girlfriend, Jennifer but things get difficult for him when he learns that both Jennifer and Marcia are competing for head cheerleader and he just happens to be one of the judges.

Peter is determined to get the part of George Washington in the school play but the teacher thinks Peter would be better in the role of Benedict Arnold. When his friends start making snide comments about it he decides to get himself kicked out of the play.

Marcia falls for Dr. Vogel, the family's new dentist. When Dr. Vogel asks Mike if Marcia would be interested in doing some babysitting for his kids, she misinterprets it for him asking her out on a date.

Bobby is crestfallen when he is picked to be safety monitor at school. With Mike and Carol's encouragement, Bobby becomes determined to be the best safety monitor ever but in the process becomes the most unwelcome person at his school, not to mention at home.

Bobby mentions to Mike and Carol that Greg was in a near car accident on the freeway due to the fact that he was reading the cover jacket of a new record. This leads Mike and Carol to suspend Greg's car privileges for a week on the eve of a big date with his girlfriend Rachel.

The Brady kids want to buy a silver platter for Mike and Carol's wedding anniversary but their short on money so they take to means to get enough cash. This leads them to put together an act and appear on a TV amateur contest.

The principal calls home to alert Mike and Carol to the fact that Bobby's playing Jesse James at school. This leads Mike and Carol to learn just how obsessed Bobby about his "idol" and try to dissuade him from worshiping a cold hearted killer.

Marcia has a big problem when she inadvertently makes two dates for the same night. One with Charlie and the other with Doug, the big man on campus. She makes a excuse to Charlie to go out with Doug but quickly learns Doug was only interested in having a pretty girl on his arm after Marcia is hit in the face with a football.

Peter is ecstatic when he gets a job at Martinelli's bike shop. However, his wanting to do a thorough job inhibits his speed and work begins piling up as well as customers begin to customers demand their bikes. This leads Mr. Martinelli to give Peter the axe.

Peter's new detective kit comes in handy when Cindy touches and then looses a pair of antique earrings that Marcia was borrowing from Carol that she warned her not to touch. This leads Peter and Cindy on an all out search for the missing earrings.

Both Robert Reed puts in double duty as Grandpa Brady as does Florence Henderson when she portrays Grandma Hutchins in an episode where the Brady kids play matchmakers and try to get Grandpa Brady and Grandma Hutchins together. However, their efforts may all be for naught when an argument erupts between Grandma and Grandpa during a romantic dinner.

Both Bobby and Cindy have to opportunity to try out to be on a televised children's quiz show if they get a certain score on a written test. However, an overconfident Bobby doesn't study at all and fails while Cindy is chosen and her ego alienates the rest of the Brady kids.

When the family cleans out the attic, both Greg and Marcia realize what a great room it would be and they both begin fighting over who gets it. This leads to yet another battle between the sexes.

As the Bradys are auditioning for a TV amateur show, a musical agent spies Greg and offers him the chance of becoming a solo star. This begins to worry Mike and Carol who hoped he would go onto college and angers his siblings for deserting them, since they were a group.

Joe Nameth guest stars as himself in this episode where Bobby lies to his friends when he tells them that he knows Joe Nameth. This leads Cindy to make up a bogus letter stating that Bobby is dying and his last wish is to meet the football star.

To get enough money for a retirement gift for a teacher, the Brady family puts on a production of Snow White and the Seven Dwarfs, but a mistake in dates threatens the performance when the Bradys have no theatre to put it on.

After Bobby defends Millicent at school she rewards him with a kiss and he immediately sees sky rockets. This leads him to try to kiss her again but after seeing those sky rockets again, she delivers the news that she may have the mumps.

Greg has finally landed a date with Sandra but he will only be able to go out with her if he can get a date for her visiting cousin, Linda. He turns to the last resort, he gets Peter to wear a fake mustache and act as if he were an older man.

Greg becomes the person who has to house Raquel, a goat who happens to be the rival school's mascot, after him and his teammates swipe her in retaliation after the other team swiped their mascot. Things get out of control when Raquel proves to be hard to handle, easy to feed and not easy to catch.

Marcia's got a new job working after school at a ice cream parlor. With both school and work, Marcia has little time for her boyfriend who, fed up comes into the parlor with another girl. Meanwhile, Marcia suggests Peter for a job but when he goofs off she is the one who fires him.

After Bobby pushes Peter out of the way of a falling ladder, Peter volunteers to be Bobby's ""slave for life."" However, Bobby begins to take advantage of the situation which yet again leads to discord in the Brady household.

Marcia becomes involved with Jerry Rogers, a quarterback for the Fairview team. Greg immediately tells Marcia the only reason he's dating her is to get his playbook, a notion Marcia scoffs at, but no one is scoffing when he actually does swipe the playbook.

Jan becomes convinced she is a "no talent loser" after she fails to make it into a ballet recital which follows with her totally dropping out of ballet and on to tap dancing which totally drives the Brady family crazy.

Mike has to present some plans for an addition at King's Island, an amusement park in Cincinnati, so he invites the whole family along but when a mix-up occurs Mike is left with a Yogi Bear poster while Jan is left with Mike's plans which she loses on one of the many rides in the park.

Marcia and Jan mistakenly overhear Sam and Alice discussing elopement and jump to the conclusion that Sam and Alice are secretly planning to. This leads the Brady family to begin planning a wedding reception.

Surprisingly the ""once no talent,"" Jan is competing in a popularity contest at school. With Peter as her campaign manager and the rest of the family pitching in, she's got a great chance of winning. However, she quickly finds herself making promises to her classmates that she can't possibly keep.

The Brady's friends, the Kellys are in the middle of adopting one little boy and soon find themselves adopting a total of three boys all of different ethnic backgrounds and they soon find themselves dealing with racist neighbors.

Greg bets Marcia that she can't beat his score on her driver's test. However all the pressure gets the best of Marcia. Meanwhile, Jan must also deal with the pressure of speaking in front of a large group of people.

After meeting an astronaut, Bobby and Peter begin wondering about life on other planets. Their wonder turns to excitement when they claim to have spotted a UFO and camp out in the backyard to get it on film.

Carol breaks the news to Mike that she's expecting and an eavesdropping Bobby and Cindy assume that she's pregnant and pass it along to the rest of the family. Unknown to them what she meant was that she's expecting her nephew, Oliver to move in with them over the summer while his parents are in Africa.

Peter is stunned after he runs into a boy who looks exactly like him at school. His look alike comes in handy when Peter inadvertently makes two dates for the same night, one with Michelle and one that he forgot he promised with the niece of Mike's boss.

When an FBI agent makes a visit to check Mike's security clearance, Bobby and Oliver both become convinced that Mike is working on some plans for a top secret project. They later become suspicious of Sam and become convinced that he plans to steal the ""secret plans"" and pass them on to the Russians.

Marcia plants a bogus story in her diary to bait Cindy after she gets fed up with Cindy's nonstop snooping. The bait is a story about Marcia contacting a talent scout after submitting a picture of Cindy and the talent scout wants Cindy to be the next Shirley Temple.

The Brady family tries to figure out who would send them a pool table and later learn that Mike's boss, Mr. Matthews is the one. Meanwhile, Bobby becomes obsessed about the game and begins betting everyone including Mr. Matthews.

Bobby, wanting to get rich quick, begins selling bottles of hair tonic and sells a bottle to Greg. However, Bobby runs for his life after the tonic turns Greg's hair orange, just days before his high school graduation.