Dennis eludes a babysitter to go to the movies that his parents are at.

Dennis replaces a fallen signpost... backwards.

Henry and Mr.Wilson try to go fishing without Dennis.

Dennis tries to fix his Grampa Perkins up with Miss Cathcart.

Mr. Wilson thinks he has discovered a space satellite.

Mr. Wilson's garden originally consisted of Dahlia bulbs. When Dennis sees them, he thinks they are ""sweet potatoes"" and after his bedtime, he ""secretly exchanges"" what is in his garden with what is in Mr. Wilson's garden. Dennis eventually raises the Dahlia bulbs & wins a 1st prize medal. After the garden judges see Mr. Wilson's garden, he is also given a medal.

Dennis helps Mr Wilson sell a neighbors house.

Dennis and Tommy camp out in the back yard. Dennis' parents friends The Melton's play a record containing wild animal sounds to entertain the boys while they are camping out in the yard. Mr. Wilson can hear the record from his house and is convinced that wild animals have escaped from the circus and are after the boys so Mr. Wilson goes out to the yard to try and save Dennis and Tommy from danger.

Dennis thinks his dad is broke so he sells bottles to try and help his dad out. However, when Dennis tells some of the neighbors what he is doing the neighbors get the wrong idea about the Mitchell's and think that they are in trouble financially.

Dennis meets Whip Crawford his cowboy idol after Mrs Webster tells Dennis he will be in the play.

Dennis tries to walk to his Grandpa's house and the police stop him and try to figure out who he is.

Mr. Wilson's Niece is getting married and asks Dennis to be the ring bear.

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 mom because she is sick and his dad is out of town.

Dennis starts a rock collection and ends up finding what he thinks is real gold on Mr. Wilson's lot

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 how.

Dennis gets an electric car for his mom from the lady who won the Raffle.

Dennis is determined to get a horse for Christmas, 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.

Dennis writes a composition for school on his best friend and he chooses Mr. Wilson to write about.

Tommy has a saxophone that he doesn't want so Dennis wants to buy it from Tommy's Mother, but when Mr. Wilson learns that Dennis is going to ask his father to buy it for him Mr. Wilson tries to talk Dennis's dad out of getting the saxophone.

Dennis accidently knocks over a bottle which fumigates the Wilson's house, So the Wilson's stay the night at the Mitchell's and Mr. Wilson walks in his sleep.

Mr. Wilson puts on a magic show for Dennis' birthday and asks Spring Byington to be his assistant

Dennis attempts to buy a fishing rod for his dad and tries to purchase it with a $50.00 Confederate bill.

Mr. Wilson gets a fortune cookie of which sais ""Beware Of Tomorrow"" and so he is convinced that the fortune will come true.

Dennis, Mr. Wilson, Mr. Mitchell 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.

Henry finds a bag of money in the rain gutter, So he calls Mr. Wilson and they take it to the police station. They later learn that the money is counterfeit.

Mr. Wilson attempts to start a fire like the pioneers did for Dennis' Junior Pathfinders club and nearly burns down the place.