Dennis puts a sign in Mr. Finch's store telling everybody not forget his mom's Birthday.

Mr. Wilson Helps Dennis start a penny collection, However Mr. Wilson fears that Dennis having a penny collection is going to be trouble to him.

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

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 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.

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.

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.