Beaver's teacher, Miss Canfield, sends a note home with Beaver and the other kids convince him that it's news that he's getting kicked out of school. Beaver and Wally take steps to hide the note from Ward and June.

Beaver and Wally send away for an alligator and they secretly keep it in the bathroom. When the alligator falls ill, the boys get some advice from Captain Jack, an owner of an alligator farm. However, keeping him a secret is going to be hard, the alligator is growing and they need a new place to keep him without June and Ward finding out.

Beaver comes home with a black eye and Ward is upset when he learns that Beaver didn't fight back. This leads Ward to teach Beaver how to defend himself. Little does Ward know that the person who punched Beaver is a girl, Violet Rutherford, the daughter of one of Ward's co-workers.

After losing his lunch money for three days in a row, Ward gives Beaver one last chance by letting him handle his haircut money. However, when he loses that too, Beaver decides to give himself a haircut just days before he's scheduled to be an angel in a play.

The Cleavers have new neighbors, the Donaldsons, and June sends Beaver over to welcome them with a vase of flowers. However, when Mrs. Donaldson thanks Beaver by kissing him on the cheek, Beaver becomes convinced that Mr. Donaldson will kill him because he let a married woman kiss him, and it's all thanks to Eddie Haskell, who planted that idea in Beaver's mind.

June has had it with Wally and Beaver's fighting and demands they make a pact to be nice to one another and do things together. However, when each boy gets an invitation for individual social outings, they each attempt to break the pact.

Wally and his friends are trying to earn enough money to buy baseball uniforms. They put a plan into action by doing their chores at a slow pace in order to maximize their hourly pay. Meanwhile, Beaver, also wanting to be on the team, begins selling water to his family and neighbors.

Beaver has a crush on his teacher, Miss Canfield. When Judy, Whitey and Larry tease him for being a 'teacher's pet,' Beaver tries to prove them wrong and places a spring snake in her desk. However, Beaver has second thoughts and becomes determined to remove the snake before she finds it.

Wally and his friends build a clubhouse and Beaver wants to join. Although the dues are $1 for 8th graders, Beaver has to come up with $3 in order to join their club. How can Beaver earn the money?

Wally and Beaver dread attending dance school, so when suddenly Wally takes a liking in it, June and Ward are dumbfounded. It seems Wally has developed a crush on a girl named Penny and Beaver soon feels neglected and left out when Wally begins spending all his time with her.

When June goes on a trip to visit her sister, Peggy, June's Aunt Martha steps in and stays with Ward and the boys. Ward and the boys do their best not to hurt Martha's feelings, but Beaver has the hardest time when she buys him a suit, knee socks, a cap, and short pants and makes him wear the outfit to school.

Wally and Beaver want to win a fancy film projector. In order to get it they have to sell 24 bottles of perfume. However, the appalling aroma of the perfume quickly leads to zero sales and has Ward trying to think up a sales gimmick.

June and Ward make Wally and Beaver promise that they won't go to the movies and see a scary movie. However, Wally and Beaver are talked into seeing it, thanks to Wally's so-called best friend, Eddie Haskell. The movie has quite an influence on Beaver, who makes a voodoo doll, names it Eddie Haskell, and sticks it with pins.

After taking an IQ test, Beaver scores the highest in his class and Mrs. Rayburn suggests that it would be best if Beaver went to a special school where his abilities can be challenged. However, little does anyone know that everything is not as it seems.

Beaver is invited to Linda Dennison's birthday party and quickly discovers that he is the only boy that she invited. Fearing for his reputation, Beaver tries his best to get out of attending, but June and Ward are insistent, not aware of the situation Beaver's in.

The local bully, Lumpy Rutherford, has been picking on Beaver and Wally and, thanks to a story Ward tells them, they decide to play a joke on Lumpy. However, their ploy catches the wrong person—Lumpy's father and Ward's co-worker Fred Rutherford, is caught in the trap.

Wally and Beaver want to get brand new bike and they ask Ward for some money. He suggests that they earn the money. This leads Wally and Beaver to get a job delivering papers. Later, while trying to help the boys out, Ward and June inadvertently almost get Wally and Beaver fired.

After Ward's bragging about Wally and Beaver being responsible, Herb and Janet Wilson assume that it would be all right to leave their 4-year old daughter in Wally and Beaver's care while they go out to a party with Ward and June. Trouble begins when the youngster locks herself in the bathroom.

Ward tries to teach Wally and Beaver the importance of saving by giving them a piggy bank. The boys quickly save up a handful of change and are all ready to spend it on some baseball equipment. However, unknown to their parents, they change their minds and decide to spend the money on a most unselfish gift.

Wally goes away on a trip with the Boy Scout troop that he belongs to, leaving a lonesome Beaver behind. Finding his friends to be busy, Beaver takes up other means to make the time go by.

Ward becomes a bit jealous when Wally and Beaver begin spending time playing basketball at Willie Dennison's house after Willie's dad put up a backboard and a basket. This prompts Ward to do the same thing but it just seems like things are working against him being the perfect father.

Beaver makes a trade with Larry Mondello: a glass doorknob for a Chihuahua. Larry found the dog in his garbage can, so when Beaver brings it home, Ward immediately breaks the news that he's going to place an ad in the lost and found and that Beaver probably won't be able to keep the dog. Despite this, Beaver quickly begins to grow close to the little pooch.

Ward helps Beaver and Wally build a miniature race car powered by a lawn mower motor and Ward makes the boys promise not to use it without him being with them. Later, Larry talks Beaver into taking it for a spin resulting in being pulled over by a traffic officer.

While playing baseball in the street with Wally, Chester and Tooey, Eddie hits a baseball through the Cleaver's window resulting in Ward forbidding the boys to play baseball so close to the house. However, later, Beaver talks Wally into pitching one, but this results in a broken car window.

After a week long visit with their Aunt Martha, Wally and Beaver prepare to head home to Mayfield on a train. After talking Martha into letting them buy their own tickets, they discover they're short the money after spending it on junk food and find themselves wondering how they are going to get home.

An eighth grade dance has Wally being pressured into attending with a girl, instead of going stag with Eddie. However, Mary Ellen Rogers becomes determined to have Wally take her and goes through Beaver to get to him.

Wanting to be liked by Wally's friends, Beaver makes up a wild story about the vacant lot next to his house being an Indian battle ground. After making a bet with Eddie, Beaver has Wally help him plant artifacts in the lot. However, that is forgotten when the kids make a discovery that they believe will make them rich.

After a weekend spent at the movies goes awry for Ward, he decides the boys should spend their weekends outside and plans a camping trip. However, when Ward's called into work, Wally and Beaver decide to camp out in the backyard.

Wally makes the baseball team and Ward openly shows how proud he is of him, leaving Beaver feeling inferior. Trying to impress his parents, Beaver tries out for the band and begins practicing the clarinet. However, Beaver soon finds himself with more problems when he's let go from the band.

June has Wally stay home from school when he comes down with a sore throat and suddenly Wally is emersed in attention from his parents, friends and doctor. Jealous and feeling left out, Beaver fakes illness, seeking that same attention.

Wally and Beaver are helping Ward clean out the garage when they run across Beaver's old teddy bear, Billy. Beaver reluctantly throws him away after Ward and Wally tell him he's too old for dolls. However, Beaver changes his mind but he's too late, the garbage truck came, which leads Beaver to take drastic measures to get him back.

Wally jumps at the chance to paint a couple of garbage cans for Ward, who offers 50 cents a piece. However, once Eddie tells Wally, that his father was charged $3.00 to have his painted, he becomes disinterested in the job which is when Beaver steps in and takes over the job.

An incident at the park leads to Beaver ripping the pants on his gray flannel suit. When he's questioned by Ward and June he makes up a wild story that his parents quickly see through. Lectured in telling the truth, Beaver does just that when the pants of his other suit are ripped but Ward and June don't believe him.

An old friend of Wally's stops by with stories about how great it is at the military school he attends. This leads Wally to decide that he would like to attend military school, despite a wary Ward and June.

An animal is chewing up June's flower bed, so Ward and the boys set a trap to catch it. They soon catch a white rabbit whom Beaver talks Ward and June into keeping. Beaver names him Henry only to later discover Henry is really a Henrietta and she's expecting.

Larry gets Beaver into trouble when he goads Beaver into trying out Ward's drill and in the end there are two holes in the garage wall. Ward hits the roof and scolds Beaver who in turn decides to run away.

Beaver is all excited to have his friend, Larry Mondello, stay over for the weekend. However, things start off on the wrong foot when Beaver and Larry get into a fight ending with Beaver punching Larry in the stomach.

The neighbors are going away for the weekend and Beaver and Wally have been put in charge of taking care of their lawn and their cat, Puff Puff. When Eddie shows up with his dog, Wolf, chaos erupts and Wolf chases Puff Puff away.

Beaver comes to Ward for help on the night before a poetry assignment is due. This prompts Ward to totally take over the project and writes the whole poem himself. Things get complicated when Beaver wins an award for the poem and Ward is faced with explaining the truth to Beaver's principal.

A school play has Beaver assigned the role of a canary. However, he doesn't seem to be graceful enough to fly around like a bird. To make matters worse, on the night of the play, Ward's words of encouragement lead to Beaver coming down with a case of stage fright.

Beaver and Wally are all excited about going to the carnival, however, Aunt Martha throws a wrench in their plans when she makes an unexpected visit with a friend of hers, forcing Wally and Beaver to count the hours away, hoping she will leave soon enough so they can still go to the carnival.

Ward takes June and the boys away on a trip to a cabin in hopes of experiencing the "great outdoors." However, he quickly discovers getting away from today's modern conveniences will be more difficult than he anticipated.

Beaver and Wally make friends with the garbage man's kids, Chris and Pete. They quickly learn that they take for granted what they have. Simple things like just having a yard to play in leave Chris and Pete in awe.

Wally, Chester and Tooey are building their own boat and plan to sail on it, despite Ward and June's forbidding Wally. Once at the lake, Beaver is the only one small enough to get in it and once on the water, the boat tips over, leaving a soaked Beaver behind. However, it's trying to keep their afternoon of boating a secret from Ward and June that's really going to wipe Wally and Beaver out.

Larry and Beaver find themselves tardy for the third time this week and decide to skip altogether. However, they quickly find themselves being caught when they inadvertently walk on the set of a live TV show.

A lazy weekend leads Ward to direct Wally and Beaver to read a book, Tom Sawyer. The book influences them so much that they take on the job of painting the garage doors. However, they soon find the job to be awfully boring and messy. Chaos erupts when neighbor Benjie Bellamy stops by wanting to help.

When the new girl, Gloria, tells Wally that he has a pug nose, he becomes incredibly self-conscious and purchases a contraption that is suppose to give him a strong Roman nose. When Ward discovers the device, he gives him a pep talk which just makes matters worse.

Beaver, Larry, and Whitey begin a pigeon club and they each purchase pigeons of their own. Beaver names his two Miss Canfield and Miss Landers, after his two teachers. However, when Beaver comes down with chicken pox, Wally is forced into caring for them, but soon finds Beaver isn't the only one ill - Miss Canfield and Miss Landers are also ailing.

Beaver learns he has to go to the dentist and that's when his friends tell him some horror stories about the drill the dentist is going to use. This prompts Beaver to become downright scared of going to the dentist.

Wally wins a trophy at school and Beaver accidentally breaks it. This leads Ward to accuse Beaver of being jealous of Wally and that he broke it on purpose. Upset, Beaver decides to get new parents and heads to an adoption agency.

Beaver and Larry become convinced that the Cooper house is haunted by a witch and Beaver and Larry are scared to death. So when June gets Beaver a job walking Mrs. Cooper's dog, Beaver's fear gets the best of him.

June and Ward allow Wally to escort Beaver on a bus to a friends house in Crystal Falls. However, on one of the stops, Beaver inadvertently gets on the wrong bus that takes him back to Mayfield.

The Cleavers have new neighbors in the Gates family and Beaver befriends their son, Gilbert Gates (his last name was suddenly changed to Bates in a later episode). However, Ward, June and Wally quickly realize the obvious when Beaver comes home with all kinds of wild stories that Gilbert has told and that Beaver is convinced are true.