Wilson The Menace

Wilson The Menace is the Fifteenth episode from Season 1.

Plot
Mr. Wilson is raking leaves in the backyard, admiring the beautiful day until he sees Dennis, Joey and Gina marching. Dennis tells Mr. Wilson they've come to help because as Gina said, you should always help elderly people. Mr. Wilson tries to argue that he isn't elderly, only for Joey to remind him he's old enough to remember black-and-white movies. Dennis gets Mr. Wilson to sit down while he, Joey and Gina do the work for him.

Gina starts to rake the lawn, while Mr. Wilson tells her to stop, only to step on the rake. Joey starts watering when he accidentally sprays the prize-winning petunias off their pots. This is where Joey accidentally waters Mr. Wilson. Dennis is cutting the bushes, only for Mr. Wilson to come in and tell him to stop. Dennis unknowingly cuts Mr. Wilson's belt. This is the last straw for Mr. Wilson, and he orders the kids out.

Dennis explains that being grumpy happens to people when they get really old. Gina starts to wonder what Mr. Wilson was like as a kid, giving Dennis an idea. The three kids rummage through the drawers and find something to hypnotize Mr. Wilson with. Alice phones Mr. Wilson about the kids planning to hypnotize him, to which Mr. Wilson laughs at and knows what to do about it. While he gets on his hammock, Dennis uses the necklace to hypnotize Mr. Wilson, and puts him to sleep.

Dennis snaps his fingers, and Mr. Wilson acts like a four-and-a-half-year-old again. Mr. Wilson wants to play "Monsters from Outer Space". Dennis agrees that Mr. Wilson be the monster, while he, Joey and Gina be the space patrol, but Mr. Wilson wants to be the other way round. Gina takes some vines out and uses them as electrified tentacles. Gina covers Joey in mud to simulate poison ooze. The three kids then find "Little Georgie".

Mr. Wilson washes the "poison ooze" off of Joey. Gina calls what Mr. Wilson did unfair, and Dennis agrees to give "Little Georgie" a taste of his own medicine. They try to throw mud at him, only for Mr. Wilson to spray water at the mud balls, hitting them back. Mr. Wilson turns the hose on at full blast to use it as a hydro blaster, and gets them with it. Gina finally admits it's no fun because he always gets them.

Mr. Wilson gets on his ride-on lawn mower, and chases Dennis, Joey and Gina with it, and Dennis agrees to quit the game. Mr. Wilson managed to teach the kids a lesson, but it taught him a lesson too because he made a mess of his own garden. Dennis comes home and gives the necklace back to Alice because hypnotism is dangerous. Dennis decides he likes the grouchy old Mr. Wilson better than the young yucky one.

Trivia

 * At the beginning, Mr. Wilson hums the Inspector Gadget theme song.