Season 1

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  6.3/1030 votes

  So Long, Old Paint/Trembly Assembly/Private I

  Season 1 Episode 1 - Aired 9/9/1985

  Mr. Wilson is painting his house and Dennis invites himself over to help out. Needless to say, Dennis' "helping" gets Mr. Wilson close to a nervous breakdown. Dennis accompanies Henry to an auto showroom, where Dennis harasses the poor salesman so, that Henry buys a new car almost to avoid a law-suit. He discovers that the purchase entitles him to watch the actual car being built on the assembly line, with the hapless salesman acting as their guide. Now Dennis turns his impulsiveness toward the robot assembly line, screwing it up completely, and their "new" car comes out looking like futuristic junk!. A Raymond Chandler-type takeoff in which Dennis pretends to be a hard-boiled private eye, in the Bogart tradition, tracking down his missing pooch, Ruff, by questioning his friends and neighbors.

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  6.8/1027 votes

  A Visitor from Outer Space/Train That Boy/Genie Madness

  Season 1 Episode 2 - Aired 9/16/1985

  An alien from another planet lands in Dennis room in a quest for peace and quiet... but Dennis wants to show him around! A mad romp ensues with Dennis taking the alien to Mr. Wilson's house.

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  6.7/1026 votes

  Cheer Up/Ghostblusters/The Life You Save

  Season 1 Episode 3 - Aired 9/23/1985

  Mr. Wilson slips on Dennis' skateboard and has to go to the hospital. Once there, Dennis arrives to cheer Wilson up... Wilson is in for the time of his life! The kids discover an abandoned old gothic house that Dennis decides would make a great club-house.

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  7.1/1026 votes

  Shark Treatment/Jungle Bungle/Racetrack Menace

  Season 1 Episode 4 - Aired 9/30/1985

  They're shooting a "Jaws"-type movie at the beach, when the remote control falls into the mechanical shark's mouth, and it zooms off. Dennis finds the fake shark, and crawling inside it, has fun frightening his friends.

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  6.9/1027 votes

  All the President's Menace/The Love Rowboat/Wilson the Menace

  Season 1 Episode 5 - Aired 6/9/1986

  Dennis and his family visit Mt. Rushmore, which is in the middle of being renovated. Dennis scales the scaffolding in an effort to help out. There he meets an old man holed up in one of the president's nostrils.

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  6.9/1025 votes

  Fishing for Trouble/Future Fortune/Time Bomb

  Season 1 Episode 6 - Aired 10/14/1985

  Dennis goes fishing with Mr. Wilson, who's out to finally catch "Old Gramps", smartest trout in the whole lake. After a number of zany mishaps due to Dennis' over-eagerness, Wilson manages to hook the prize-winning fish -- only to have Dennis cause it to escape back into the water. When Mr. Wilson gets his hands on a radio that PeeBee has invented -- one that seems to... Read all

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  6.6/1022 votes

  Spa Blahs/Whale of a Tale/Disaster on the Green

  Season 1 Episode 7 - Aired 10/21/1985

  Mrs. Wilson has bought George a gift membership at a Health Spa. Dennis accompanies Wilson on his first visit, where he proceeds to drive poor Wilson nuts, speeding up his exercycle, pouring bubble bath in the spa water, etc. Finally the management tears up Wilson's membership.

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  6.3/1019 votes

  Here, Kitty!/Circus Berserkus/The Monster of Mudville Flats

  Season 1 Episode 8 - Aired 10/28/1985

  Dennis brings home a stray kitten which Alice makes him turn over to the Wilsons. But the "kitten" is actually a baby mountain lion, which proceeds to wreck the Wilson's home. Things get worse when it's angry mother shows up, looking for its cub!. Mr. Wilson takes Dennis and Joey to the circus and ends up being the main event.

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  6.2/1020 votes

  The Price of Stardom/Space Menace/The Magic Flute

  Season 1 Episode 9 - Aired 11/4/1985

  Dennis is made the prop man for the community theater whereupon he turns a serious drama into a roaring comedy. When Henry takes Dennis and the gang on a tour of his aerospace company, the gang slips away. They find a rocket ship and decide to investigate. Once inside, Dennis hits a button and WHOOSH! they are blasted into outer space.

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  5.9/1018 votes

  Dennis' Yard Sale/The Abominable Snow Menace/It Came from the Planet Dennis

  Season 1 Episode 10 - Aired 11/11/1985

  When Henry and Alice leave to go to a "Poor People's" charity auction, Dennis decides to help the poor people by selling most everything in the Mitchell household.

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  5.8/1019 votes

  Snowman Madness/The Invisible Kid/Home Destruction

  Season 1 Episode 11 - Aired 11/18/1985

  Slippery ice causes chaos when Henry and Dennis set out to make a snowman. After tumbling and sliding all over the ski resort, they end up as part of a snowman and receive hot cocoa for their efforts.

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  5.5/1020 votes

  Chitty Chitty Moon Walk/Wet 'N Wild/Dennis at the Movies

  Season 1 Episode 12 - Aired 11/25/1985

  Dennis keeps his eye on the secret solar powered moonwalker for his Dad. But when Joey touches the wrong button, it takes them for a stop-and-go-ride around town, eventually leading two crooks who want to steal it to the police. Dennis and Joey build a raft to go down the local river.

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  6.0/1018 votes

  The Supermarket/The Big Candied Apple/The Defective Detector

  Season 1 Episode 13 - Aired 12/2/1985

  Dennis visits a supermarket and completely dismantles it. The Mitchell's visit New York. The Statue of Liberty will never be the same. The gang goes to the beach and decide to look for treasure with a metal detector. Once there, a bully tries to take it away from them. Ultimately, Dennis saves the bully from danger by way of the metal detector's powerful magnet.

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  6.0/1019 votes

  Henry the Menace/Come Fly with Me/Camping Out

  Season 1 Episode 14 - Aired 12/9/1985

  Henry's father comes to visit, and he tells Dennis what Henry was like as a little boy. Not surprisingly, the child-sized Henry and the present-day Dennis had a lot in common. They both create chaos wherever they go. Dennis and PeeBee enter a friendly challenge of building and flying their own airplanes.

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  6.1/1018 votes

  Up Up and Away (From Here)/Going Ape/Dennis the Pirate

  Season 1 Episode 15 - Aired 12/16/1985

  Dennis, George, Henry, and Joey all enter a balloon race. Dennis wins the race, but only after a wild series of adventures. A take-off on King Kong, in which PeeBee, experimenting with a gas-filled balloon, loses control of it, and he, Dennis, Margaret, and Joey, are carried off, ending up on a banana-shaped island.

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  6.2/1018 votes

  It's a Ruff Life/Professor Myron Mentalapse/Dennis Race 2000

  Season 1 Episode 16 - Aired 12/23/1985

  When Ruff upsets one of PeeBee's experiments, the dog and Joey end up with their brains switched, Ruff can speak, while Joey can only bark! PeeBee and Dennis chase them around town, trying to capture them and re-switch their brains back to their owners.

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  5.7/1020 votes

  A Better Mousetrap/The Wizzer of Odd/Canine Car Wash

  Season 1 Episode 17 - Aired 12/30/1985

  Mrs. Wilson will not return until Mr. Wilson gets rid of all the mice. PeeBee's special mousetraps are regarded as circus rides by the mice and they come from everywhere to play, which costs Mr. Wilson a lot of quarters, the price he pays to the boys for each mouse captured.

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  5.7/1019 votes

  Ride'Em Cowboy/Tenting Tonight/A Hair Raising Tale

  Season 1 Episode 18 - Aired 1/6/1986

  Dennis and his parents visit the beautiful ranch of his favorite Uncle Bud. Uncle Bud has always wanted to win the local rodeo, and Dennis helps him out by riding the wildest bronc in six counties!. Henry's company has developed a sophisticated self-inflating tent to be used by space explorers on the moon.

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  6.1/1016 votes

  Medieval Evil/Beaver-Mania/Say Uncle

  Season 1 Episode 19 - Aired 1/13/1986

  No description available

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  5.8/1019 votes

  Hopping Mad/Mayan Mayhem/The Big Power Trip

  Season 1 Episode 20 - Aired 1/20/1986

  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.

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  5.8/1019 votes

  Strong Medicine/Gold Strike/Lights! Camera! Mud!

  Season 1 Episode 21 - Aired 6/16/1986

  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.

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  5.8/1019 votes

  Invasion of the Blob/Wild West Show-Down/The Hen Party

  Season 1 Episode 22 - Aired 2/3/1986

  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.

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  5.7/1019 votes

  Up Up and Oh Boy!/The Company Picnic/Aw Nuts!

  Season 1 Episode 23 - Aired 2/10/1986

  On a bicycle-built-for-two Henry and Mr. Wilson race after Dennis, Margaret and Joey who have accidentally taken flight in Henry's newest invention, a dirigi-blimp.

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  6.0/1020 votes

  Clip-Joint Capers/Tanks for the Memory/Second Honeymoon

  Season 1 Episode 24 - Aired 2/17/1986

  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.

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  5.8/1020 votes

  A Couple of Coo-Coos/The Cloneheads/Nothing But the Tooth

  Season 1 Episode 25 - Aired 2/24/1986

  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.

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  6.1/1017 votes

  Mummy's Little Boy/Horsing Around/Dennis Plasters Pamplona

  Season 1 Episode 26 - Aired 3/3/1986

  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.

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  5.9/1018 votes

  Dennis Predicts/Dennis & the Kangaroo Cavalry/Meatball Mess

  Season 1 Episode 27 - Aired 3/10/1986

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  6.0/1018 votes

  My Fair Dennis/A Good Knight's Work/Life in the Fast Lane

  Season 1 Episode 28 - Aired 3/17/1986

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  5.8/1017 votes

  A Nightmare at the Opera/A Royal Pain/Having a Marbleous Time

  Season 1 Episode 29 - Aired 3/24/1986

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  5.8/1017 votes

  Marky the Menace/Dennis the Genius/A Step Ahead

  Season 1 Episode 30 - Aired 3/31/1986

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  6.0/1017 votes

  The Boss Gets Scalped/Mr. Dennistein/Lean Green Jumping Machine

  Season 1 Episode 31 - Aired 4/7/1986

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  6.2/1017 votes

  Laundry Business/Journey to the Center of Uncle Charlie's Farm/Dennis Springs Into Action

  Season 1 Episode 32 - Aired 4/14/1986

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  5.9/1020 votes

  Ruff's Hat Trick/A Moving Experience/Lemon-Aid

  Season 1 Episode 33 - Aired 4/21/1986

  After Dennis gets his father stopped by a policeman, Ruff swipes the cop's hat and Dennis and the cop chase him through the city streets leaving a mess in their wake. Dennis stops a bank robber when Ruff is found and is made an honorary policeman.

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  6.2/1017 votes

  Sounds in the Night/Dennis Does Hollywood/Ruff to the Rescue

  Season 1 Episode 34 - Aired 4/28/1986

  Mischievous Dennis Mitchell (Mason Gamble) makes the life of neighbor George Wilson (Walter Matthau) miserable with his overactive energy and inadvertent troublemaking.

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  6.3/1017 votes

  The Bicycle Thief/Menace of the Mine Shaft/Margaret's Birthday Party

  Season 1 Episode 35 - Aired 5/5/1986

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  6.2/1018 votes

  So Sorry!/Shock Therapy/Yard Wars

  Season 1 Episode 36 - Aired 5/12/1986

  Mischievous Dennis Mitchell (Mason Gamble) makes the life of neighbor George Wilson (Walter Matthau) miserable with his overactive energy and inadvertent troublemaking.

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  6.2/1017 votes

  Ruff's Masterpiece/Going to the Dogs/Big Baby

  Season 1 Episode 37 - Aired 5/19/1986

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  6.1/1017 votes

  Building a Better Dog House/Dennis and the Dragon/Hic!

  Season 1 Episode 38 - Aired 5/27/1986

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  6.1/1017 votes

  Strike Up the Band/Queen of Chinatown/Tale of a Tux

  Season 1 Episode 39 - Aired 6/2/1986

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  6.2/1017 votes

  Give a Little Whistle/Charmed I'm Sure/After Hours

  Season 1 Episode 40 - Aired 6/9/1986

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  6.2/1017 votes

  Baseball's Best Ballplayer; Mr. Wilson's Diet; The Backyard Band

  Season 1 Episode 41 - Aired 6/16/1986

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  6.2/1018 votes

  Double Dennis/Timber Wolves/Help Not Wanted

  Season 1 Episode 42 - Aired 6/23/1986

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  5.8/1017 votes

  Million Dollar Dennis/3-D and Me/Barber Shop Disharmony

  Season 1 Episode 43 - Aired 6/30/1986

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  6.4/1018 votes

  Bowling for Dennis/Dennis Conquers the Navy/The Longest Half-Yard

  Season 1 Episode 44 - Aired 7/7/1986

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  6.7/1018 votes

  Vampire Scare/Give Me Liberty or Give Me Dennis/Wilson for Mayor

  Season 1 Episode 45 - Aired 7/14/1986

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  6.4/1018 votes

  Dangerous Detour/The Prodigy/The Chimp

  Season 1 Episode 46 - Aired 7/21/1986

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  6.5/1018 votes

  High Steel/Bicycle Mania/Little Dogs Lost

  Season 1 Episode 47 - Aired 7/28/1986

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  6.5/1020 votes

  Dennis Destroys Dallas/Black & Blue Hawaii/Oil's Well That Ends Well

  Season 1 Episode 48 - Aired 8/4/1986

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  6.2/1017 votes

  Door to Door Bore/Dennis in Venice/Young Sherlock Dennis

  Season 1 Episode 49 - Aired 8/11/1986

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  6.2/1017 votes

  Surf's Up/Yo Ho Ho/The Karate Kiddie

  Season 1 Episode 50 - Aired 8/18/1986

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  NaN/100 votes

  Dennis and the Deep/K-9 Kollege/Housepests

  Season 1 Episode 51 - Aired 8/25/1986

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  NaN/100 votes

  Animalympics/No Bones About It/Dennis Takes the Cake

  Season 1 Episode 52 - Aired 9/1/1986

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  NaN/100 votes

  Quiet Riot/The Magic Pen/A Feeling for Stealing

  Season 1 Episode 53 - Aired 9/8/1986

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  NaN/100 votes

  Househusband Henry/Wheeling & Double-Dealing/Stop That Car!

  Season 1 Episode 54 - Aired 9/15/1986

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  NaN/100 votes

  Lights, Camera, Auction!/Boy Ahoy/Faulty Alarm

  Season 1 Episode 55 - Aired 9/22/1986

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  NaN/100 votes

  Hail to the Chief/Dennis in Microchipland/Handy Dandy Dennis

  Season 1 Episode 56 - Aired 9/29/1986

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  NaN/100 votes

  Dennis the Businessman/Soccer it to Me, Dennis/Camp Over Here-Over There

  Season 1 Episode 57 - Aired 10/6/1986

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  NaN/100 votes

  Hullaballoo at the Harmony Homes/Phantom of the Wax Museum/Dennis and the Gypsy Woman

  Season 1 Episode 58 - Aired 10/13/1986

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  NaN/100 votes

  Attack of the Giant Tomatoes/The Dinosaur Doozy/Funhouse Grouch

  Season 1 Episode 59 - Aired 10/20/1986

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  NaN/100 votes

  Dennis Rocks Out/Deserted with Dennis/Fashionable Menace

  Season 1 Episode 60 - Aired 10/27/1986

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  NaN/100 votes

  Back to the Drawing Board/Part-Time Helper/G.I.George

  Season 1 Episode 61 - Aired 11/3/1986

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  NaN/100 votes

  Wanted: Scarface Wilson/Ruff Come Home/10-4 Dennis

  Season 1 Episode 62 - Aired 11/10/1986

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  NaN/100 votes

  Heroes Unwelcome/The Martians are Coming/Ancient Olympics

  Season 1 Episode 63 - Aired 11/17/1986

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  NaN/100 votes

  Pool Haul/Fool for Gold/Nothin' to Be Afraid Of

  Season 1 Episode 64 - Aired 11/24/1986

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  NaN/100 votes

  Yankee Doodle Dennis/Dennis the Barnstormer/Trial and Error

  Season 1 Episode 65 - Aired 12/1/1986

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