Dennis thinks a marriage has been arranged for him.
Dennis hears the Wilsons arguing and spreads the news around the neighborhood, leading some of the neighbors to think the Wilsons have split up.
Distributor Dennis loses circulars.
Dennis serves as a judge in a trial in which Mr. Wilson is the defendant.
The Mitchells believe that Mr. Wilson lost his money in the stock market.
To research an article, Wilson lives with gypsies.
Dennis and his school’s new principal get off on the wrong foot after the principal takes a remark about his height the wrong way.
Wilson brings a chimp from San Diego to the town zoo.
Wilson and Dennis wind up in a naval march.
Dennis runs away from home because Henry is thinking of getting a new job that would relocate him and his family.
Mr. Wilson hangs out and plays with Dennis and his friends for the day to gather information for a magazine article about the changing behaviors of children.
Mr. Wilson takes over an advice-to-the-lovelorn newspaper column for a few weeks, thinking he will have every single woman in town happily married by the time he finishes.
Mr. Wilson believes that a hermit Dennis visits at his shack out in the woods fought in the Civil War, so he tries to get his life story.
Mr. Wilson has written a book about his Uncle Ned’s life, but Ned does not want the book to be published.
Mr. Wilson is named chairman of a saving-stamps campaign for the Junior Astronauts and arranges a contest at Dennis’ school to win a trip to Cape Canaveral to meet an astronaut.
Mr. Wilson tells Dennis he isn’t feeling well just to get Dennis to leave him alone, but Dennis of course spreads the word and leads everyone to believe that Mr. Wilson is very sick.
Mr. Wilson gives Dennis a book called Secrets Of The Indian Rain Dance, and he and his friends decide to give it a try.
Mr. Wilson searches for the creature who's leaving behind big footprints.
Dennis plays matchmaker.
Dennis tries to convince senators to turn a mountain into a national forest.
Teased about his height, a boy quits the basketball team.
Mr. Wilson is convinced that he is allergic to Dennis because he sneezes every time Dennis is around.
Mrs. Wilson knits several baby booties to use as covers for a new set of golf clubs, and Dennis quickly spreads word around the neighborhood.
Mr. Wilson is in a jam when he wins a contest that's limited to parents.
Dennis ties a message onto a homing pigeon, not realizing the paper contains Mr. Wilson's stock market information.
A neighbor's cat is bothering Mr. Wilson; he thinks cats are a nuisance; when he finds out there is an ordinance that requires cats to be licensed, he unwillingly volunteers to do the job of rounding them up.
A phantom burglar's latest theft is described in the paper just before Henry leaves town.
Mr. Wilson is enraged over an increase in school taxes.
Wilson plans a movie star's memoirs.
Wilson thinks there may be a reward for a stray.
Dennis washes Wilson's tuxedo.
Chaos reigns when there's a mix-up in plans for a Hawaiian vacation.
Mr. Wilson buys a rabbit's foot from Dennis, but it brings him everything but luck.
Mr. Wilson runs for the presidency of the bird-watcher's club.
Dennis and Mr. Wilson's plan to sell their comic books goes awry.
Dennis and friends picket a bookstore that won't display Wilson's book.
Mr. Wilson hopes he'll be his aunt's heir, but she seems to favor Dennis.
Dennis' fascination with UFOs lands Mr. Wilson in an embarrassing situation.
Mr. Wilson sets out to prove he deserves the Good Citizen award.
Henry gets a ticket for stepping on grass.
Henry and Mr. Wilson think the house they bought as an investment is haunted.
Mr. Wilson helps Dennis with his school play.
Mr. Wilson tries to win a five-minute shopping spree.
Mr. Wilson helps Dennis' team.
Mr. Wilson dreams of a luxurious life when he hears about his aunt's will.
An automatic testing machine deems Dennis a genius.
Mr. Wilson regrets having sold his good-luck charm to Dennis.
Mr. Wilson thinks the Mitchell's Christmas tree is too small.
Dennis visits the bank every day to check on his account.
Dennis promises to keep Mr. Wilson's secret to himself.
Mr. Wilson holds a bird lovers’ session at his home that includes a woman who does realistic bird calls.
Mr. Wilson agrees to give Dennis his magnifying glass as long as he doesn’t say a word to him or around him for the rest of the day.
Mr. Wilson sets out to win the prize for the best performance in Dennis' play.
Mr. Wilson bets on a frog-jumping contest.
Mr. Wilson decides to leave Dennis a gold watch in his will. Soon after, Mr. Wilson begins to feel old and is convinced that he only has a short time to live.
Mr. Wilson's uncle, a fitness fanatic, attempts to get Henry and Wilson in shape.
Wilson plans a quiet evening with his coin collection.
Mr. Wilson’s wallet is taken by a pickpocket, so Dennis and Tommy try to help the police find the crook.
Mr. Wilson hires a housekeeper for Mrs. Wilson but soon regrets it when the housekeeper tries to tell Mr. Wilson what he can and cannot do in his own home.
Mr. Wilson tries to get rid of a stray dog.
Dennis and Mr. Wilson make a documentary featuring the townspeople.
Mr. Wilson is torn between a contest drawing and an obligation to Dennis.
Disasters plague Mr. Wilson's attempt to join an exclusive club.
Mr. Wilson buys a treasure chest at an auction thinking that it has a pirate’s treasure in it.
Dennis wants Mr. Wilson to go to the new dentist who hands out presents.
Mr. Wilson thinks his next-door neighbor is the stocking bandit and tries to prove it.
A store owner hopes to become the coach of Dennis' baseball team.
In order to get out of playing house with Margaret, Dennis decides to help Mr. Wilson’s Uncle Ned plant flower bulbs in his yard.
Dennis is determined to cure Mr. Wilson's writer's block.
After selling a rare 1919 dime for $150, Mr. Wilson buys ten raffle tickets from Dennis and ends up winning a chicken. When he wants to cook the chicken for dinner, Dennis and his friends try to talk him out of it.
Alice makes Dennis promise not to fight after he is picked on by the school bully.
Dennis wants to join an older boys’ club, but, in order to do so, he has to go through an initiation.
Mr. Brady and Tiny, an employee at his store, challenge Henry and John to compete against them in the sporting events at an upcoming community picnic.
Mr. Wilson is writing a magazine article about voodoo. Dennis gets the wrong idea and tells the whole neighborhood that Mr. Wilson is a witch doctor.
Wilson is asked to give up his retirement to run a company office in Pittsburgh.
Dennis is underfoot during wedding preparations.
Dennis finds $1,650 in a radio set that Mr. Wilson gave him.
Dennis' gopher wanders over to Mr. Wilson's backyard.
Dennis finds Mr. Wilson's telephone book, which has a $500 stock certificate inside.
Alice and Dennis are in charge when Henry leaves on a business trip.
Mr. Wilson hopes to get away from Dennis by holding a rock-collecting contest.
Dennis tries to stop a goldfish tank leak.
The town holds a Paint-up, Clean-up Week campaign and everyone spruces up their place; Dennis gets into the act with paint from Mr. Wilson to paint his red wagon; Dennis paints the wagon and the street corner; Mr. Wilson gets blamed.
Both Dennis and Mr. Wilson are ashamed that they have never learned to whistle and try everything they can think of, including eating very sour cherries, to be able to do so.
Mr. Wilson hopes to win a car in a raffle, but Dennis sells the ticket.
Dennis thinks the horse he wanted for Christmas was sent to another house.
Dennis and Tommy go into business.
Mr. Wilson's plan to keep Dennis in his own house and away from him by teaching him to collect money backfires.
Mr. Wilson wants to be park commissioner.
Dennis hears that Miss Cathcart needs a good friend.
Dennis picks Mr. Wilson as the subject for an essay about his best friend.
Dennis asks to have Tommy's saxophone.
While their house is being fumigated, the Wilsons sleep over at the Mitchells'; when Dennis learns that Mr. Wilson has been known to walk in his sleep, he invites all his friends over to see it.
Dennis wants Mr. Wilson to perform as a magician at his birthday party; Mr. Wilson is reluctant to do so, until he learns that actress Spring Byington will also be guest at the party.
Mr. Wilson is eager for Dennis to go to summer camp; when Henry is unexpectedly unable to take Dennis and several of Dennis's friends to visit the camp, Mr. Wilson is happy to step in and takes them there himself.
Mr. Wilson has his car trunk open to use the car jack to change a flat tire; while no one is looking Miss Cathcart's cat jumps in and then Dennis closes the trunk.
Dennis buys his mother a going-away gift.
Dennis wants to buy his father a fishing rod.
Dennis sets a good example for Mrs. Wilson.
Dennis cares for an incubator full of eggs.
Mr. Wilson decides to teach his dog Fremont a few commands; Dennis asks if he can help train Fremont and Mr. Wilson allows him to do all the training; after the dog is trained, Fremont only responds to Dennis and not to Mr. Wilson.
Dennis feeds crows in the backyard, causing noise while Mr. Wilson is on the phone trying to argue for keeping an old tree from being chopped down; one of the crows grabs a hundred dollar bill from Mr. Wilson's and flies off to the old tree.
Mr. Wilson's attempts to build a backyard barbecue are stymied by his teenage helper's playing loud music and by a search for Dennis's wandering pet turtle.
Dennis decides to enter a soapbox derby, after being taunted by a neighbor boy and his father; Mr. Wilson and Henry Mitchell help build the race car; a last second change is made and the winner of the derby is a surprise to everyone.
Dennis takes pictures of Mr. Wilson's night-blooming flowers.
Dennis helps with gardening; Mr. Wilson thinks he has miracle plant-food.
Dennis and Tommy decide to print a newspaper.
Problem: persuading Mrs. Wilson to take a trip to Mexico. Dennis: Jay North. Mr. Wilson: Joseph Kearns. Mrs. Wilson: Sylvia Field. Hubbard: Vaughn Taylor. Alice: Gloria Henry. Henry: Herbert Anderson.
Mr. Wilson's fortune cookie message leaves him wary about selling his coin collection.
Mr. Wilson tests the survival skills of Henry and Dennis in the forest.
Henry finds a bag of money in the gutter and calls Mr. Wilson to witness his discovery; they take it to the police station but later learn that the money is counterfeit.
Dennis sneaks out on his babysitter to go to the movies where his parents are and causes trouble at the theatre.
Dennis switches a signpost and causes chaos.
Dennis plays matchmaker when the widowed Grandpa Perkins pays a visit but grandpa resists meeting eligible women.
Mr. Wilson believes he has discovered another satellite by using Dennis' telescope.
Mr. Wilson wants to win a gardening prize.
Wilson wants a childless couple to move into the neighborhood.
Mr. Wilson thinks circus animals have escaped.
Dennis' thrifty ways lead the neighbors to believe the Mitchells are broke.
Henry tries to get Mr. Wilson to a luncheon.
Dennis' parents are sure they have a good hiding place for his presents.
Dennis hopes to land a role in the village pageant.
Dennis hosts his club in the Wilsons' basement; Mr. Wilson believes the house is haunted.
A rare warbler moves into Dennis' treehouse.
Alice and the other mothers set out to raise money for a playground.
Dennis' parents refuse to buy him a new scooter.
The Mitchells plan an open house to entertain a customer of Henry's firm.
Dennis' snails and duck end up in Wilson's yard.
Dennis wants a backyard swing.
Dennis' dog-sitting charge ruins a painting.
Mr. Wilson sets out to prove classic books for children are better than the modern ones.
Dennis remotely switches on Mr. Wilson's TV set.
Dennis asks a reporter to write a story about his dad with hopes of getting his picture in the paper.
Mr. Wilson helps Dennis with a newspaper drive.
Dennis is afraid he will lose his pet bees.
Dennis decides to advertise Alice's birthday.
Dennis winds up baby sitting.
Mr. Wilson has a bunch of starlings in his tree and wants to get rid of them. Dennis eventually gets rid of the starlings by putting liver in Mr. Wilson’s tree, which attracts a lot of cats.
The Mitchells' new neighbors share a phone line.
Dennis protests when he believes the city has been unfair to the postman.
Dennis is saddened when all his friends are too busy to play with him.
Dennis plays matchmaker while trying to sell valentines.