Dennis the Menace

Up, Up, and Oh Boy!: Henry takes Dennis, Jay, and Margaret out to the field to test his company's new derigiblimp. The Company Picnic: Henry takes Dennis to his company's father/son picnic, and the two compete in the various games with the other fathers and sons, including a pair of troublemaking bullies. Aw Nuts!: Dennis wants to catch a squirrel to keep as a pet, but the crafty animal is able to outsmart him and Ruff at every turn.

Wrapped head to toe in bandages while playing hospital, Joey gets picked up by an ambulance and taken to the hospital. Dennis and Margaret attempt to rescue him and make a shambles of the hospital corridors. Dennis makes friends with an old horse named Horace. He rides him in the Town Derby, and they win spectacularly. The Mitchell's visit Pamplona, Spain just before the running of the bulls. But Dennis accidentally releases the bulls a day earlier, and Henry finds himself chased into a bull ring. He fights off literally hundreds of bulls, becoming the greatest matador of all time.

Dennis accidentally locks the keys in the car while out in the country with Mr. Wilson for a demonstration of homing pigeons. Dennis ties a note to the pigeon which gets stuck in a tree and then Mr. Wilson gets stuck after freeing the bird. Mrs. Wilson arrives with the fire department after seeing him on the news. PeeBee's newest invention accidentally makes four more of Dennis to the terror of Margaret, Mr. Wilson, and his parents. PeeBee and the original Dennis lure the clones back into the invention with an ice cream truck bell and the neighborhood is restored to "peace.". PeeBee invents a robot tooth-puller to extract Joey's tooth. They practice on Mr. Wilson, removing his dentures, which terrifies Joey straight to the dentist's office. Realizing where he is, he heads for the door where Dennis accidentally knocks him down and the tooth falls out.

After making the barber's guard dog sick, Dennis volunteers Ruff for watch dog. When bank robbers next door drill a hole in the wall of the barber ship to escape through, Dennis and Ruff capture them but make a shambles of the barber shop. Dennis, his parents, and the Wilsons visit an Army base in Arizona. Somehow, Dennis and George Wilson become trapped in a runaway, computerized tank...which is headed straight for the Grand Canyon!. The Mitchells return to the lodge where they spent their honeymoon. Dennis brings his frog and causes so much disturbance that they are asked to leave. Henry and Alice don't mind, preferring to keep their memories unclouded.

A blob from outer space enters various forms tree, Ruff, Alice, Henry, Mr. Wilson, baseball in search of a good place to plan an invasion. But Dennis manages to make the blob uncomfortable no matter where it hides. The invasion is called off since the blob feels a planet full of people like Dennis is unconquerable. Henry and Alice take Dennis to a western-type theme park, where he sees a re-enactment of a stage-coach hold up. Think the hold up is real, Dennis leaps aboard the getaway stagecoach to stop them, and ends up at a boarded-up Ghost Town Saloon. There Dennis, using the available props in the "haunted" saloon, frightens the cowboy actors into turning themselves in to the authorities. It turns out they really were hold up men, using the wild west show to cover their tracks. George tells Dennis that Martha and Alice are going to have a "hen party" with a few of their friends. Trying to help out, Dennis brings a few chickens to the affair, which causes instant, mass confusion.

Dennis is blasted by a "strength ray" that Peebee has invented, and suddenly has super muscles. he goes around using his new-found strength to do various good deeds; rescuing kittens from tall trees, etc. Dennis challenges the town bully to a fight, not realizing that his super strength has worn off. But the bully proves to be a coward, and runs off anyway. The Mitchells and PeeBee visit Gold Field Air Force base in the desert to watch a test flight of a rocket plane developed by Henry's company. More interested in finding gold, Dennis and PeeBee stumble upon some spies who are planning to explode the plane. The boys' quick thinking brings help and foils the spies' plans. Dennis is directing a movie about a "Mud Monster" that attacks the neighborhood kids He asks Mr. Wilson if he'll play the creature. Wilson's vanity gets the best of him and he agrees. Unfortunately for him, the scenes call for him to take a terrible beating... not to mention being covered in mud. In the end, Wilson, trying to get home, accidentally drives his car in the swamp they were shooting around.

Dennis buys a magician's hat and gives it to Margaret at her cello recital. The hat goes wild, spewing frogs and rabbits all over the place, creating all kinds of comedy. Dennis and George Wilson take the wrong vacation plane and end up in South America, being pursued by Mayan natives. They have all kinds of wild adventures trying to get back home. Dennis, Ruff, and Henry visit a city power plant. Ruff gets loose on the big control board, and Dennis chases him. They hit every power switch on the board, turning the entire town into a pinball machine.