Dennis successfully eludes a babysitter and sneaks out of the house to go to a cowboy movie that his parents are also attending.
Dennis and Tommy fix a fallen street signpost but fail to notice they've put it up with the street names facing in the wrong direction.
Mr. Wilson and Dennis' father plan a secret early-morning fishing trip without Dennis, but he suspects something is afoot due to various clues they leave. Their sleep the night before is disrupted by Dennis' restless curiosity.
Dennis tries to fix up his Grandpa Perkins with Miss Cathcart and other ladies in the neighborhood.
Mr. Wilson thinks he has discovered a space satellite when in reality it is Dennis shooting glow-in-the-dark ping-pong balls out of his blaster gun.
Dennis mistakes Mr. Wilson's dahlia bulbs for sweet potatoes, and, after his bedtime, he switches the sweet potatoes for dahlia bulbs.
Dennis helps Mr. Wilson sell a neighbor's house.
Mr. Wilson returns from a camping trip, inspiring Dennis and Tommy to camp out in the backyard. That night, Mr. Wilson mistakenly thinks the circus train has crashed and the animals have escaped, but the noises are only the Mitchells' neighbor playing a sound-effects record.
Dennis thinks his father is broke, so he sells bottles in an attempt to make some extra money while informing the neighborhood of the Mitchells' dire straits.
Henry tells Dennis that he and the family are moving to New York in order to keep Mr. Wilson in town for an award he is to receive. Dennis then informs the neighborhood of their supposed move.
Dennis is going crazy trying to find his gifts, which include a new sled.
Dennis meets Whip Crawford, his cowboy idol, after Mrs. Webster tells Dennis that Whip will be in the community pageant.
Mr. Wilson becomes suspicious when he hears noises caused by Dennis and his friends, who have set up their clubhouse in a crawl space underneath his house.
Mr. Wilson attempts to teach Dennis about bird watching. Dennis takes care of a sick bird, which proves to be the first of its species ever found in their region, prompting a visit by an excited bird club official.
Mr. Wilson purchases a rare coin for $250, but Dennis finds it and throws it in a wishing well, which was the town fountain.
When his parents won't buy him his own bicycle, Dennis attempts various ways to get one on his own, including guessing beans in a glass bowl.
Dennis' house is mistaken for a nearby open house that is up for sale, thus attracting a crowd of strangers into what the Mitchells had intended as a small party for friends.
Dennis gets a pet duck that causes havoc in the neighborhood.
Henry tries to take Alice out on their Anniversary. Meanwhile Dennis tries to build a swing in his yard and ends up chasing a cat up a tree in the process.
Dennis cares for a dog named Charlie who wins a prize from the art club for his painting.
Dennis meets Mr. Wilson's sister, Helen who reads the book Treasure Island to Dennis and his friends, and they become fascinated with buried treasure. Mr. Wilson draws a treasure map to trick the boys into tilling his garden plot.
Dennis goes to any length to get his own TV. Meanwhile, Mr. Wilson gets a remote control for his, which Dennis takes advantage of.
Dennis asks a reporter to write a story about his dad with hopes of getting his picture in the paper.
Mrs. Holland tells Dennis that anyone who collets the most newspapers for a paper drive will win a 1985 silver dollar. Mr. Wilson finds out and wants it for his coin collection.
Dennis and Tommy learn that local handyman Opie Swanson might have to move because his bees can't find honey. The boys move Mr. Wilson's indoor flowers outside to attract the bees, and Dennis sprays them with perfume, causing great confusion.
Henry will be out of town for Alice's birthday, so he gives Dennis some money to buy her a present. Dennis's antics cause mayhem and damage in the variety store.
Dennis winds up babysitting a little boy who is a guest of the Wilsons after his father and Mr. Wilson mistakenly both cancel their respective sitters.
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 Driscolls are new neighbors, but problems arise as their phone is on a shared line with the Mitchells. Henry gets angry at Mr. Driscoll for monopolizing the line, not realizing that Dennis and his friends actually were the ones using it, and furthermore that Mr. Driscoll is a valued client of Henry's company.
After hearing that the city is tearing down Mr. Dorfman's "Postman's Rest" bench in favor of a parking lot, Dennis and Tommy offer him use of their private bench they plan to build.
Dennis has nobody to play with after Joey goes home. Since nobody can drive him, he decides to walk to his grandfather's house but is stopped by the police. At the police station, he refuses to tell his name, is given ice cream, and causes further havoc including putting cement in Mr. Wilson's bowling ball and accidentally handcuffing an officer.
Dennis sells Valentine's Day cards in July to by swim fins, which end up causing a run on Valentine's day cards around the entire neighborhood.
Mr. Wilson gets a visit from his former boss who offers him his job back in Pittsburgh. When Dennis thinks Mr. Wilson is moving to Pittsburgh, he runs away from home.
Mr. Wilson's Niece is getting married and asks Dennis to be the ring bearer.
Mr. Wilson gives Dennis an old radio set that he mistakenly bid for at an auction. However, When Dennis finds money in his radio set, Mr. Wilson gets excited. So him and Mitchell put in add in the paper hoping the real owner isn't around to claim it.
Dennis gets what he thinks is a hamster which turns out to be a gopher that escapes from his cage and almost ruins Mr. Wilson's yard.
Mr. Wilson has a stock certificate worth $500. He hides it in his Phone book, however when Dennis brings him in his new phone book Mr. Wilson goes crazy and ends up going to the warehouse where all the old phonebooks are taken to look for his old phone book because he thinks the stock is still in it.
Dennis tries to take care of his sick mother while his father is out of town.
Dennis starts a rock collection and ends up finding what he thinks is real gold on Mr. Wilson's lot.
Mr. Wilson tricks Henry out of playing golf so that he'll spend more time with Dennis, and Dennis won't bother Mr. Wilson. Meanwhile, Dennis and Tommy try to deal with a hole Dennis accidentally put in the fish tank.
Dennis wants to help out for Paint-up, Clean-up week. So Mr. Wilson gives Dennis a bucket of red paint to paint his wagon with. Dennis however also decides to paint the street curve by Mr. Wilson's house and Mr. Wilson gets blamed for it.
Dennis is very upset because he doesn't know how to whistle, so he spends all day trying to learn.
Mr. Wilson is conducting a car raffle for his lodge, and Dennis wants to win the car for his mother. Through a mixup, Mrs. Wilson gives Dennis a winning ticket which had originally been bought by her husband.
Dennis wants a horse for Christmas and gets a record player instead. So, on Christmas Day, he goes around the neighborhood trying to find what he thinks is his horse.
Dennis is trying to learn about how to earn money by working. His dad eventually starts him on an allowance.
Mr. Wilson helps Dennis start a penny collection, hoping it will preoccupy him quietly indoors. However, Dennis pesters the nearby grocer repeatedly for rolls of coins, spills them on the floor of the store, and causes Mr. Wilson to get arrested.
Dennis convinces Mr. Wilson to run for park commissioner because the playground is closed except on weekends.
Dennis wants to find Miss Cathcart a best friend, so he gets her a dog from the pound. However, the dog's owner is looking for him and ends up showing up at Miss Cathcart's house before Dennis brings the dog over to her. She mistakenly thinks that the guy is the friend instead of the dog.
Dennis is to write a composition for school about his best friend, and he chooses Mr. Wilson.
Tommy has a saxophone that he doesn't want, so Dennis wants to buy it from Tommy's mother. When Mr. Wilson learns that Dennis is going to ask Henry to buy it for him, Mr. Wilson tries to talk Henry out of it.
Dennis accidentally knocks over a bottle which fumigates the Wilsons' house, so the Wilsons stay at the Mitchells' for the night, Mr. Wilson sharing a bed with Dennis. Mr. Wilson walks in his sleep.
Mr. Wilson puts on a magic show for Dennis' birthday and asks Spring Byington to be his assistant.
Mr. Wilson takes Dennis and several friends to a camp open house, and they exhaust him with a day of long hikes and activity. As they prepare to return home, they are told they will be stranded there for a week because a storm has taken out a bridge.
Miss Cathcart's cat is accidentally locked in the trunk of Mr. Wilson's car.
Dennis gets his mom a going away present and hides it on Mr. Wilson's closet shelf and Mrs. Wilson finds it and thinks it's a gift from Mr. Wilson.
Dennis attempts to buy a fishing rod for his dad and tries to purchase it with a $50.00 Confederate bill.
Dennis decides he wants a bird, but he knows that once his dad sees his report card, he won't get it. So his dad does agree to reward Dennis if he brings home a better report card next term.
Dennis brings home chicken eggs to take care of for his school project, but ends up taking them over to Mr. Wilson's house because the Mitchell's electricity went out.
Dennis trains Mr. Wilson's dog Fremont, which backfires when Fremont will only listen to Dennis and ignores Mr. Wilson.
Mr. Wilson drops a hundred-dollar bill, and a crow picks it up and flies away with it. He later finds it in an old tree in a park which the park commissioner is going to cut down.
Mr. Wilson builds a barbecue in his backyard with help from Dennis' friend, Fred Baines. They then realize something valuable was left inside, and it must be torn down.
Dennis enters a soapbox derby, and Mr. Wilson accidentally ends up being the one driving Dennis' car in the race.
Mr. Wilson is supposed to take a picture of a plant that blooms briefly at night, but ends up dozing off when the time comes. Luckily, Dennis takes the picture of the flower for him.
Dennis accidentally steps on one of Mr. Wilson's plants. He buys Mr. Wilson a replacement and plants it in his flower bed without Mr. Wilson knowing. When Mr. Wilson sees the plant, which is much larger than the one that was there originally, he is convinced that the new miracle plant food he invented is the cause of the growth.
Dennis overhears Mr. Wilson saying that he wishes he had his raccoon coat back. Dennis gives the story to the newspaper and, as a result, all day, people bring Mr. Wilson raccoon coats.
Mr. Wilson wants to go to the Island of Happiness in Mexico, but changes his mind when he hears that his niece is going to have a baby.
Mr. Wilson gets a fortune cookie that reads "beware of tomorrow" and is convinced that the fortune will come true.
Dennis, his father, and Mr. Wilson camp out as pioneers to prove to Mr. Krinkie that they can live of the land like the pioneers.
Dennis decides to give Mr. Wilson his own father's day, which in the end turns out for the best when Dennis gets Mr. Wilson out of a lawsuit concerning his dog, Fremont.
Dennis' father finds a bag of money in the gutter. He calls Mr. Wilson to witness what he's found, and they take it to the police station. They later learn that the money is counterfeit.
Mr. Wilson accidentlly gets a space helmet that belongs to Dennis stuck on his head.
Dennis and Mr. Wilson camp out on a moutain so that Dennis can join the Junior Pathfinders club.
Henry gets a ticket for walking on the grass in the park. When Mr. Wilson hears about it he thinks it isn't fair, So he convinces Henry to go to court and contest it.
Dennis is using numbers for a football play which is the combination to Mr. Wilson's safe, So Mr. Wilson and Henry get Dennis so confused that he forgets the combination. Then Mr. Wilson forgets it. Now they are in a real mess because Mr. Wilson has something very important locked in the safe. So Mr. Wilson tries everything including trying to hypnotize Dennis so he can remember the combination. He ends up hypnotizing himself and remembers the combination at last.
Mr. Wilson and Henry both invest in a house that is known to be a haunted house.
Dennis' school is putting on a play which Mr. Wilson ends up being in (not by choice) because him and Tommy (who is also in the play) get handcuffed together before the play starts.
Mr. Finch is having a contest that when the fifty-thousandth customer walks in his store they will win 5 minutes of free shopping of which Mr. Wilson is determined to be the one who wins.
Mr. Wilson coaches Dennis' Pee Wee League baseball team because Dennis' dad (who originally was the coach) got sick.
Mr. Wilson wants to represent Scotland for Dennis' School
The school test scores mistake Dennis as a genius.
Mr. Wilson tricks Dennis into taking a silver coin that says GOOD LUCK and a horseshoe on it instead of 50 cents that he owes him for cutting his lawn. Mrs. Wilson is very angry with him about it. So, she and Alice start a scheme of their own by making lucky things happen to Dennis all day. Mr. Wilson soon starts to believe that the coin was lucky after all and is sorry he ever let it go. He then realizes that it was all a charade to teach him a lesson.
Dennis, Henry and Mr. Wilson go out in the woods and cut down a big Christmas tree which ends up getting almost destroyed by the time they get it home.
Dennis opens a bank account at the bank of where Mr. Wilson works at and causes a lot of chaos at the bank.
Dennis' cub scouts are putting on a circus of which Mr. Wilson is the Lion in the circus, which is suppose to be a secret from everyone.
Mr. Wilson holds a bird lovers session at his home Where a woman does bird calls that sounds just like a bird.
Mr. Wilson agrees to give Dennis his magnifying glass if he doesn't talk around him for the day.
Dennis is put on the spot when he askes both Mr. Wilson and Mr. Mactavish to represent Scotland in his school project.
Dennis enters his frog in the frog jumping contest with Mr. Wilson as his partner who has a bet with Sgt. Mooney that Dennis' frog will beat his.
Mr. Wilson gives Dennis a Gold watch in his will. Soon after that Mr. Wilson begins to feel old and is convinced that he has short time to live.
Mr. Wilson's Uncle comes to visit him and convinces him that he isn't in shape, so he starts a physical fitness program and forces Mr. Mitchell and Mr. Wilson to be in it.
Mr. Wilson gets his wallet taken by a pick pocket, So Dennis and Tommy try to find the crook for the police.
Mr. Wilson hires a housekeeper for Mrs. Wilson but soon regrets it when the housekeeper tries to tell Mr. Wilson what he can and can't do in his home. Mr. Wilson then tries to get rid of her.
A big shaggy dog followes Mr. Wilson home and Mr. Wilson tries to get rid of it.
Dennis does a documentary film of the town for a school project with Mr. Wilson's help.
Mr. Wilson takes Dennis and his friends up to the lake and back in an old car. Mr. Wilson then gets elected president of the Horseless Carriage Club.
Mr. Wilson attempts to start a fire like the pioneers did for Dennis' Junior Pathfinders club and nearly burns down the place.
Mr. Wilson buys a treasure chest at an auction thinking that it has buried treasure in it. Mr. Wilson later discovers a treasure map drawn by Dennis. Although Mr. Wilson thinks the map is authentic so he plans to take a trip to the island and dig for the treasure.
Dennis convinces Mr. Wilson to go to the Dentist for his tooth because Dennis thinks he can get a basketball from the Dentist until he learns that the Dentist only gives away prizes to child patients.
Mr. Wilson thinks his next door neighbor is the stocking bandit and tries to prove it.
Mr. Quigley coaches Dennis' baseball team with help from Sandy Koufax.
Dennis helps Mr. Wilson's Uncle Ned plant flower bulbs in his yard in order to get out of playing house with Margaret Wade.
George Wilson's brother John Wilson comes to visit, only he has trouble working without his old cushion.
Dennis and his friends win John Wilson a chicken, which John wants to cook for dinner and the children try to talk him out of it.
Dennis is all set for a big day. He is scheduled to have a fight with Gifford - the school bully.
Dennis wants to join an older boys club, but in order to do so he has to take an initiation.
The Neighborhood Community puts on a carnival in the park with different winning contests to participate in.
Mr. Wilson is doing a magazine article on voodoo, Dennis gets the wrong idea and tells the whole neighborhood that Mr. Wilson is a Witch Doctor, Soon the whole town gets the wrong idea about Mr. Wilson.
Mr. and Mrs. Wilson have a Chinese girl that is staying with them while Mr. Wilson is interviewing the girls father for a magazine article.
Dennis hears Mr.& Mrs. Wilson argue and spreads it around the Neighborhood and soon some of the neighbors think that the Wilson's have split up.
Dennis gets a job for a day delivering Circulars for Mrs. Elkins. But, When he swaps territories with another kid, he gets blamed for throwing the circulars in a trash can.
Dennis and the children take over Judge Mcconnell's court for a day for children's day in court.
Dennis thinks that Mr. Wilson is broke so he tries tries to help him out.
Mr. Wilson gets mixed up with Gypsyes and they think he is one of them.
Dennis gets a new Principal, Mr. Spivey who is very strict at his school. Mr. Spivey and Dennis get off on the wrong foot at first However, Johnny Brady takes note of that and because he wants to be on the pitcher on the school baseball team. So, he sets Dennis up by drawling a picture on the back of his paper making fun Mr. Spivey's height. When Mr. Spivey finds it he naturally assumes Dennis is the one that drew it so he punishes Dennis by kicking him off the baseball team and keeping him after school. As the news travels Mr. Wilson, Mr. Quigley and Mr. Finch all go to the school a few minutes apart and talk to Mr. Spivey each claiming to be Henry Mitchell to stand up for Dennis. Mr. Spivey gets confused but soon realizes he misjudged Dennis and ends up apologizing and putting Dennis back on the school baseball team.
Mr. Wilson gets a chimpanzee from the San Diego zoo which causes chaos at the Motel that the Wilsons and the Mitchells are staying at.
Mr. Wilson's nephew visits him and gives Mr. Wilson and Dennis a ride in his navy truck and then Mr. wilson and Dennis get trapped on the navy base.
Henry is thinking of getting a new job which takes place neer the Asian river. Dennis does what he can to prevent it including running away from home.
Mr. Wilson hangs out and plays with Dennis and his friends the whole day to gather information for a magazine article of what young children do in this day and age.
Mr. Wilson is doing a column for the newspaper that he thinks will have every single women in town happily Married. However, it ends up getting Sgt. Mooney in a love triangle with Miss Cathcart and Miss Tarbell.
Dennis visits a hermit out in the woods, Mr. Wilson thinks that he fought in the civil war, so he tries to get his life story.
Mr. Wilson has written a book on his Uncle Ned's life for his publisher. Uncle Ned however does not want the book to be published So Mr. Wilson goes up to Uncle Ned's house to try and reason with him. The only thing is that Uncle ned has gone down to Mr. Wilson's house to talk with him as well. Now it is up to Dennis to try and keep Uncle Ned from meeting the publisher until Mr. Wilson can return home again.
Dennis' School has a contest that any student who collects the most stamps wins a trip to Cape Canaveral and meet an Astronaut. Unfortunately, Dennis comes down with the chicken pox right when he is about to win.
Mr. Wilson tells Dennis he isn't feeling well to get Dennis to leave him alone and then Dennis tells the whole neighborhood, So they all think that Mr. Wilson is very sick.
Dennis and his friends do an indian rain dance to try to get Henry out of playing golf with his boss.
Mr. Wilson thinks he has discovered big-foot prints in his yard which end with hilarity results.
Dennis becomes confused about love when he hears his parents and Mr.& Mrs. Wilson argue with one another.
Dennis is appointed by the Mayor to go to Washington and ask the Senater to pass a bill for a national Forest.
Dennis and his friends help a boy who is poor and feels that he doesn't fit in prepare for and play in the school basketball game.
Mr. Wilson is convinced that he is allergic to Dennis because he sneezes every time Dennis is around. It is later discovered that it was only the hair tonic that Dennis had been using what was causing Mr. Wilson's allergies.
Dennis sees baby booties knitted for Mr. Wilson's golf clubs and he thinks that the Wilson's are having a baby, So he goes around and tells the whole neighborhood.
Mr. Wilson enters a contest that requires having children, so he passes Dennis and his friends off as his kids.
Dennis accidentally ties an important note that belongs to Mr. Wilson on a pigeon, so Mr. Wilson, Henry, Tommy and Dennis go to where the pigeons roost at night at a spooky house to try and get the note back and end up in the middle of a collage fraternity initiation meant for new fraternity members. After a bunch of twists and turns they find the pigeon with the note tied on it.
Mr. Wilson becomes a cat catcher for the police department to try and enforce a cat leash law.
Dennis stays at the Wilson's house overnight while his parents are out of town which turns out to be a long night for everyone with different incidents.
Dennis and his friends decide to play Robin Hood and help Mr. Wilson(big John) when he is in trouble, only Dennis and his friends end up making things worse for Mr. Wilson.
Mr. Wilson disapproves of the way Dennis' school operates, So he writes his opinion to the newspaper and spends a day at school to observe.
Mr. Wilson attempts to dye his hair in order to look younger for an actress he is interviewing for her life story. However, the dye made his hair look worse and so he cons Henry into taking his place which end in a bunch of tangled webs.
Mr. Wilson takes in a stray dog he believes is worth a 100 dollar reward.
Dennis and his friends start up a laundry business and clean Mr. Wilson's tuxedo, only Dennis gets Mr. Wilson's tuxedo mixed up with other peoples.
Mr. Wilson is planning to take Mrs. Wilson to Hawaii. But when Mr. Wilson has the plane tickets mailed to the Mitchell's, Alice thinks Henry is taking her to Hawaii.
Dennis has what he thinks is a lucky rabbit's foot, Mr. Wilson tricks Dennis into letting him borrow it because he thinks it will bring him good luck.
Mr. Wilson has a mockingbird in his yard which is keeping him awake every night, So he takes the birds nest out of the tree.
When Dennis takes his comic books over to show Mr. Wilson, Mr. Wilson writes an important phone number on one of the comics, So when Dennis leaves and takes his comic books Mr. Wilson spends all day looking for the comic book he wrote the phone number on.
Dennis wants to be a grown man for a day while his dad is out of town, So all day he does what he thinks his dad normally does.
When Mr. Wilson's Aunt Emma pays a visit she takes an instant liking to Dennis, causing Mr. Wilson to fear she will make Dennis her heir.
In this crossover episode, we learn that the Stones live in the same hometown as Dennis the Menace. Neighbor Dennis (the Menace) Mitchell offers to help Donna redecorate the Stone house and ends up making things even worse.
Original Opening and Closing commercials from the second season of Dennis the Menace.
