Mr. Wilson gets mixed up with Gypsyes and they think he is one of them.

Dennis becomes confused about love when he hears his parents and Mr.& Mrs. Wilson argue with one another.

Mr. Wilson takes in a stray dog he believes is worth a 100 dollar reward.

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.

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 helps Mr. Wilson's Uncle Ned plant flower bulbs in his yard in order to get out of playing house with Margaret Wade.

Mr. Wilson wants to go to Mexico to the Island of Happiness but changes his mind when he hears that his Neice is going to have a baby at the time when he was going to go.

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.

Dennis and his friends do an indian rain dance to try to get Henry out of playing golf with his boss.

A big shaggy dog followes Mr. Wilson home and Mr. Wilson tries to get rid of it.

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.

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.

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 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.

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.

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

George Wilson's brother John Wilson comes to visit, only he has trouble working without his old cushion.

It's Children's Day in Court, and Dennis is the Judge! Mr Wilson goes to court to dispute a ticket he received for violating a city ordinance.

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.

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.

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.

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.