S1 E1 - So Long, Old Paint/Trembly Assembly/Private I

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.

Sep 9, 1985

S1 E2 - A Visitor from Outer Space/Train That Boy/Genie Madness

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.

Sep 16, 1985

S1 E3 - Cheer Up/Ghostblusters/The Life You Save

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.

Sep 23, 1985

S1 E4 - Shark Treatment/Jungle Bungle/Racetrack Menace

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.

Sep 30, 1985

S1 E5 - All the President's Menace/The Love Rowboat/Wilson the Menace

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.

Jun 9, 1986

S1 E6 - Fishing for Trouble/Future Fortune/Time Bomb

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

Oct 14, 1985

S1 E7 - Spa Blahs/Whale of a Tale/Disaster on the Green

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.

Oct 21, 1985

S1 E8 - Here, Kitty!/Circus Berserkus/The Monster of Mudville Flats

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.

Oct 28, 1985

S1 E9 - The Price of Stardom/Space Menace/The Magic Flute

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.

Nov 4, 1985

S1 E10 - Dennis' Yard Sale/The Abominable Snow Menace/It Came from the Planet Dennis

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.

Nov 11, 1985

S1 E11 - Snowman Madness/The Invisible Kid/Home Destruction

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.

Nov 18, 1985

S1 E12 - Chitty Chitty Moon Walk/Wet 'N Wild/Dennis at the Movies

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.

Nov 25, 1985

S1 E13 - The Supermarket/The Big Candied Apple/The Defective Detector

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.

Dec 2, 1985

S1 E14 - Henry the Menace/Come Fly with Me/Camping Out

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.

Dec 9, 1985

S1 E15 - Up Up and Away (From Here)/Going Ape/Dennis the Pirate

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.

Dec 16, 1985

S1 E16 - It's a Ruff Life/Professor Myron Mentalapse/Dennis Race 2000

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.

Dec 23, 1985

S1 E17 - A Better Mousetrap/The Wizzer of Odd/Canine Car Wash

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.

Dec 30, 1985

S1 E18 - Ride'Em Cowboy/Tenting Tonight/A Hair Raising Tale

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.

Jan 6, 1986

S1 E19 - Medieval Evil/Beaver-Mania/Say Uncle

Jan 13, 1986

S1 E20 - Hopping Mad/Mayan Mayhem/The Big Power Trip

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.

Jan 20, 1986

S1 E21 - Strong Medicine/Gold Strike/Lights! Camera! Mud!

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.

Jun 16, 1986

S1 E22 - Invasion of the Blob/Wild West Show-Down/The Hen Party

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.

Feb 3, 1986

S1 E23 - Up Up and Oh Boy!/The Company Picnic/Aw Nuts!

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.

Feb 10, 1986

S1 E24 - Clip-Joint Capers/Tanks for the Memory/Second Honeymoon

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.

Feb 17, 1986

S1 E25 - A Couple of Coo-Coos/The Cloneheads/Nothing But the Tooth

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.

Feb 24, 1986

S1 E26 - Mummy's Little Boy/Horsing Around/Dennis Plasters Pamplona

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.

Mar 3, 1986

S1 E27 - Dennis Predicts/Dennis & the Kangaroo Cavalry/Meatball Mess

Mar 10, 1986

S1 E28 - My Fair Dennis/A Good Knight's Work/Life in the Fast Lane

Mar 17, 1986

S1 E29 - A Nightmare at the Opera/A Royal Pain/Having a Marbleous Time

Mar 24, 1986

S1 E30 - Marky the Menace/Dennis the Genius/A Step Ahead

Mar 31, 1986

S1 E31 - The Boss Gets Scalped/Mr. Dennistein/Lean Green Jumping Machine

Apr 7, 1986

S1 E32 - Laundry Business/Journey to the Center of Uncle Charlie's Farm/Dennis Springs Into Action

Apr 14, 1986

S1 E33 - Ruff's Hat Trick/A Moving Experience/Lemon-Aid

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.

Apr 21, 1986

S1 E34 - Sounds in the Night/Dennis Does Hollywood/Ruff to the Rescue

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

Apr 28, 1986

S1 E35 - The Bicycle Thief/Menace of the Mine Shaft/Margaret's Birthday Party

May 5, 1986

S1 E36 - So Sorry!/Shock Therapy/Yard Wars

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

May 12, 1986

S1 E37 - Ruff's Masterpiece/Going to the Dogs/Big Baby

May 19, 1986

S1 E38 - Building a Better Dog House/Dennis and the Dragon/Hic!

May 27, 1986

S1 E39 - Strike Up the Band/Queen of Chinatown/Tale of a Tux

Jun 2, 1986

S1 E40 - Give a Little Whistle/Charmed I'm Sure/After Hours

Jun 9, 1986

S1 E41 - Baseball's Best Ballplayer; Mr. Wilson's Diet; The Backyard Band

Jun 16, 1986

S1 E42 - Double Dennis/Timber Wolves/Help Not Wanted

Jun 23, 1986

S1 E43 - Million Dollar Dennis/3-D and Me/Barber Shop Disharmony

Jun 30, 1986

S1 E44 - Bowling for Dennis/Dennis Conquers the Navy/The Longest Half-Yard

Jul 7, 1986

S1 E45 - Vampire Scare/Give Me Liberty or Give Me Dennis/Wilson for Mayor

Jul 14, 1986

S1 E46 - Dangerous Detour/The Prodigy/The Chimp

Jul 21, 1986

S1 E47 - High Steel/Bicycle Mania/Little Dogs Lost

Jul 28, 1986

S1 E48 - Dennis Destroys Dallas/Black & Blue Hawaii/Oil's Well That Ends Well

Aug 4, 1986

S1 E49 - Door to Door Bore/Dennis in Venice/Young Sherlock Dennis

Aug 11, 1986

S1 E50 - Surf's Up/Yo Ho Ho/The Karate Kiddie

Aug 18, 1986

S1 E51 - Dennis and the Deep/K-9 Kollege/Housepests

Aug 25, 1986

S1 E52 - Animalympics/No Bones About It/Dennis Takes the Cake

Sep 1, 1986

S1 E53 - Quiet Riot/The Magic Pen/A Feeling for Stealing

Sep 8, 1986

S1 E54 - Househusband Henry/Wheeling & Double-Dealing/Stop That Car!

Sep 15, 1986

S1 E55 - Lights, Camera, Auction!/Boy Ahoy/Faulty Alarm

Sep 22, 1986

S1 E56 - Hail to the Chief/Dennis in Microchipland/Handy Dandy Dennis

Sep 29, 1986

S1 E57 - Dennis the Businessman/Soccer it to Me, Dennis/Camp Over Here-Over There

Oct 6, 1986

S1 E58 - Hullaballoo at the Harmony Homes/Phantom of the Wax Museum/Dennis and the Gypsy Woman

Oct 13, 1986

S1 E59 - Attack of the Giant Tomatoes/The Dinosaur Doozy/Funhouse Grouch

Oct 20, 1986

S1 E60 - Dennis Rocks Out/Deserted with Dennis/Fashionable Menace

Oct 27, 1986

S1 E61 - Back to the Drawing Board/Part-Time Helper/G.I.George

Nov 3, 1986

S1 E62 - Wanted: Scarface Wilson/Ruff Come Home/10-4 Dennis

Nov 10, 1986

S1 E63 - Heroes Unwelcome/The Martians are Coming/Ancient Olympics

Nov 17, 1986

S1 E64 - Pool Haul/Fool for Gold/Nothin' to Be Afraid Of

Nov 24, 1986

S1 E65 - Yankee Doodle Dennis/Dennis the Barnstormer/Trial and Error

Dec 1, 1986