The fate of the planet in the hands of Larry, Moe and Curly Joe? That's exactly the situation the trio finds themselves in when they befriend a wacky scientist and must defend his secret invention from a pair of malevolent Martians. Sight gags, slapstick and plenty of nyuks abound as the Stooges bumble their way through an adventure of intergalactic proportions.
The stooges are the 'Minute Menders', three tinkers who live under their car. The boys decide to drum up some business by punching holes in the unattended lunch boxes of some workmen. When they're caught in the act, they escape and accidentally get hired as riveters on a new building, working on the 97th floor. Their ineptitude and lousy workmanship screw up construction of the building and they must parachute off the building to escape the wrath of the boss.
The stooges escape from jail when they learn their father, who has just become rich, is planning to leave their mother and marry a young girl. Curly is mistaken for the stooges father (he plays both parts) and marries the girl instead. When they learn that she is working with gangsters who plan to kill their father for his money, they escape and take their father with them.
The stooges are janitors in an office building. They stencil the wrong names on all the offices, causing a rich lady to mistakes Moe for famous decorator Omay. She hires the boys to redecorate her house, which they proceed to ruin. More trouble ensues when the real Omay shows up.
Curly wins $50,000 in a radio contest and the stooges move into the Hotel Costa Plente. Their suite is furnished with many expensive items which they systematically wreck, running up quite a bill. When they discover that, minus tax deductions, the jackpot is only $4.85 they quickly agree to marry three pretty rich widows who are also living in the hotel. The "widows" are actually gold diggers conniving to the get the jackpot money. When the girls find out what the jackpot is really worth, the boys get conked with champagne bottles.
The stooges, professional dog washers, find a baby on a doorstep and, thinking it to be abandoned, take it home. When they read in the paper the baby is believed to have been kidnapped, they disguise Curly as a the baby's mother and try to sneak past the local cop. They are caught, but when the baby's parents show up and realize what happened, the result is a happy ending.
After being thrown out of their apartment, the Stooges try a scam to get some money: find a hotel, slip on a cake of soap, and sue the owners to get a huge settlement. In their attempts they come across an old lady who is on the brink of losing her hotel if she doesn't pay the interest on her note. Taking pity on her, they immediately start fixing up the place, turn it into a swanky nightclub, and go all out to impress important columnist Waldo Twitchell on opening night.
The Stooges are carpenters who become policemen. A mysterious burglar disguised as a gorilla has the cops baffled and Mr. Dill, the head of the citizens league, threatening the police chief's job. The boys go on the case and pose as night watchmen at an antiques store. They confront the crook, who turns out to be a real gorilla owned by Dill. After defeating Dill and some other bad guys in a wild fight, the gorilla drinks some nitroglycerin and blows up.
The Stooges get a job putting up posters for a circus but discover that instead of money, their pay is tickets to the show. When trying to scalp their tickets gets them in trouble, they hide out backstage where Curly has an encounter with a bearded lady and Moe and Larry hide in a horse suit. When they're caught, the circus manager gives them a choice of going to jail or joining the circus. What they don't know is that they are to be targets for the Zulu spear thrower. When Curly hits the spear thrower with one of his own spears, the boys are on the run once again.
The stooges are janitors working in the offices of Doctors Harts, Burns and Belcher. Some crooks arrive seeking medical attention after their boss has been wounded in a shoot out with the cops. Mistaken for doctors, the boys are forced to operate on the wounded crook, but instead they accidentally dump him out the window into a passing police car. The rest of the gang chases them into a store room filled with dummies where the cops finally catch the bad guys.
The stooges are three inventors trying to a get a patent on their preposterous fly catching invention. When they learn they'll have to catch 100,000 flies to earn enough to get a patent, some crooks overhear and think the boys are the $100,000 sweepstakes winners. When the crooks give chase, the stooges hide in a sporting goods store where Curly shoots a dummy, which they mistake for a real person. The boys decide to bury the "body" in a pet cemetery, but the cemetery owner arrives from a costume party with his partners, all dressed as spooks, and they proceed to scare the devil out of the stooges.
The stooges are three fish peddlers who decide to cut out the middleman by catching their own fish. They trade their car and $300 for a "new" boat which turns out to be a piece of junk that soon falls apart and sinks in the middle of the ocean. Luckily the boys also have a row boat which they climb into and then try to signal some passing planes for help. Unfortunately, their paint spattered rag is mistaken for a Japanese flag and they are bombed from the sky.
Curly learns that he is named in the will of his rich uncle, so the boys head for the uncle's mansion to attend the reading of the will.
The Stooges are working in a radio station where a pretty girl has just made a recording of "Voices of Spring" under an assumed name.
The stooges are bumbling electricians who decide to go away for a rest after they are fired for their incompetence. The rest home they choose is run by Dr. Mallard, a quack who gyps the patients for everything they've got. When the boys discover the crooked goings on they escape, but not before Curly accidentally cures another patient who rewards him with a thousand dollars.
The Stooges are actors who can't hold a job, so they decide to jump off a high building and end it all. On the roof top they meet three pretty dancers with the same idea. Before they can jump, they meet a millionaire Broadway producer who hires them all for his next show. The rehearsal goes so well that he doubles their salary, but it all comes to naught when they discover that the "producer" is an escaped patient from Dr. Dippy's retreat.
The stooges are castaways from a garbage scow who land on Dead Man's Island where everyone is living in olden times. To escape from the governor, they disguise Curly as a Maharaja and win permission to journey to their own country to fetch presents. The governor is fooled, but the boys run into more trouble in the den of Black Louie the pirate where Curly is forced into a knife throwing contest with Larry as the target. Things look bad until a mis-thrown knife cuts the rope that holds the chandelier and it crashes down on Black Louie's men. With the pirates defeated, Moe decides to take over as ruler of the island.
A professor bets one of his colleagues that he can turn the Stooges into gentlemen within 60 days. With the aid of his pretty daughter, the professor tries to teach the boys proper etiquette. After many frustrating attempts, he introduces the Stooges into society at a fancy party. At first things go all right, but the party soon degenerates into a wild pie fight.
The stooges go out west for Shemp's health and get mixed up with some bad guys. The villains have locked up the Arizona Kid and their leader plans to marry his girl, Nell. The boys help the Arizona Kid escape and he rides to fetch the Cavalry. Somehow, the stooges manage to defeat the bad guys before the Cavalry arrives.
The stooges are scammed out of their inheritance by Icabob Slipp, a crooked lawyer. The boys follow Slipp onto a passenger train and corner him, but not before they accidentally let a lion loose on the train. The only Stooges SHORT where Moe, Curly and Shemp appear together.