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 accidentlly gets a space helmet that belongs to Dennis stuck on his head.

Mr. Wilson holds a bird lovers session at his home Where a woman does bird calls that sounds just like a bird.

Mr. Wilson wants to represent Scotland for Dennis' School

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.

Mr. Wilson thinks his next door neighbor is the stocking bandit and tries to prove it.

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.

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.

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. 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.

Dennis and Mr. Wilson camp out on a moutain so that Dennis can join the Junior Pathfinders club.

Mr. Wilson coaches Dennis' Pee Wee League baseball team because Dennis' dad (who originally was the coach) got sick.

The school test scores mistake Dennis as a genius.

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 agrees to give Dennis his magnifying glass if he doesn't talk around him for the day.

Mr. Wilson plans to have a quiet evening at home, but his plans change when Henry needs a sitter for Dennis.

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 gets his wallet taken by a pick pocket, So Dennis and Tommy try to find the crook for the police.

Mr. Wilson and Henry both invest in a house that is known to be a haunted house.

Dennis opens a bank account at the bank of where Mr. Wilson works at and causes a lot of chaos at the bank.

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.

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 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 enters a contest that requires having children, so he passes Dennis and his friends off as his kids.