Gerald Clamson (Jerry Lewis) is a bank examiner who loves fishing on his annual two week holiday. Unfortunately one day at the ocean he reels in an injured gangster in a scuba diving suit named Syd Valentine (also played by Lewis). Syd tells Gerald about diamonds he has stolen from the other gangsters and hands him a map. Gerald escapes as frogmen from a yacht machine gun the beach. They swim ashore and locate Syd where they machine gun him. Their leader Thor (Harold J. Stone) ensures Syd's demise by firing a torpedo from his yacht that goes ashore blowing a crater into the beach.
As the police ignore Gerald's story, Gerald heads to the Hilton Inn in San Diego where Syd claimed the diamonds were hidden. There he meets Suzie Cartwright (Susan Bay), an airline stewardess. While searching for the diamonds, he needs to avoid the hotel staff after inadvertently hurting the manager (Del Moore). Gerald disguises himself as a character noticeably similar to Professor Julius Kelp from The Nutty Professor, while trying to stay one step ahead of the other gangsters who are on his tail, as well as the hotel detectives led by the manager - all the while courting Suzie. As each of the gangsters see Gerald, an identical lookalike to the deceased Syd, they have nervous breakdowns; one imagining himself a dog, one turning into a Larry Fine lookalike, the other (Charlie Callas, in his usual character) becoming a hopeless stutterer. The one man Gerald meets the who believes him, who identifies himself as a FBI Special Agent, turns out to be an escapee from an insane asylum.
The movie climaxes in a chase through Sea World San Diego, where Gerald is pursued by Thor's gangsters, a rival group of gangsters who had made a deal with Syd to buy his diamonds, and a group of Chinese who smuggle the diamonds disguised as plastic pearls. Gerald disguises himself as a Kabuki dancer but is pursued until Suzie rescues him by flying by with a helicopter and dropping a rope ladder that Gerald escapes on. They return to the Pacific Ocean, where Syd reappears. The gangsters chase Syd into the ocean, and Gerald and Suzie walk away, deeply in love. The diamonds are never located.
The final scene shows the narrator, Frank De Vol, facing the camera and solemnly announcing that the tale is true—then the camera pulls back as De Vol turns and walks away on the breakwater where the beginning and ending action had taken place. De Vol is wearing all of a business suit except trousers, and he is carrying a briefcase.

Warren Nefron is a hopeless klutz who has some of the worst luck in the world: when he tries to end it all with a foolproof suicide plan, he still manages to mess it up. In desperation, he goes to a psychiatrist to see if there is some way for him to end his troubles. As the doctor talks with him, the film cuts to a series of shorts about scenes from Nefron's life, and the lives of the people around him.

In Jerry Lewis's first film in a decade, he plays Bo Hooper, an unemployed circus clown who can't seem to hold down a job. The film opens with a brief montage of clips from past Lewis movies. He then moves into a succession of jobs that he gets himself fired from including a gas station attendant and a mailman - all with disastrous results.

A UNICEF-sponsored six-film anthology depicting childhood horrors around the world. "Hassane" - a malnourished child in Niger needs help from the doctors, but village traditions prohibit it. "Liouba" - a child escapes to the forest after a beating by his alcoholic mother, but the games he plays in the forest mirror his troubles at home. "Boy" - a child faces discrimination as the only white student at his school. "Carmelo" - in Bogota a child living on the streets fights to survive. "Oca" - when his twelve year old brother dies free-diving in the Philippines, seven year old Oca must take his place on the job. "L'enfance de l'art" - children living and playing in a war zone are touched by violence.

Paramutual Pictures wants to know where all the money is going so they hire Morty to be their spy. Morty works for Mr. Sneak and gets a job in the mail room so that he can have access to the lot. But all that Morty ever finds is that he can cause havoc no matter what he does.

A young heiress must choose between six uncles, one of which is up to no good and out to harm the girl's beloved bodyguard who practically raised her.
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Nine-year-old Donna Peyton is orphaned when her father dies and leaves her with a $30 million fortune. Her late father's attorney, John Wyman, explains that she must visit each of her six uncles (all played by Jerry Lewis) and decide which of them will become her new "father."

Stanley is a bellboy at the Fountainbleau Hotel in Miami Beach, where he performs his duties quietly and without a word to anyone. All he displays are facial expressions and a comedic slapstick style. And anything that can go wrong, does go wrong when Stanley is involved. One day, Jerry Lewis arrives at the hotel and some of the staff notice the striking resemblance.

Helmut Doork, a once great and famous clown, is fired from the circus. Getting drunk at a local bar, he pokes fun at Hitler in front of some Gestapo agents, who arrest and send him to a prison camp. Helmut angers his fellow prisoners by refusing to perform for them, wanting to preserve his legend. As times passes, Jews are brought into the camp, with fraternizing between them and the other prisoners strictly prohibited. Eventually, Helmut is forced by the others to perform or be beaten. His act bombs and he leaves the barracks depressed, trying the routine out again alone in the prison yard. He hears laughter and sees a group of Jewish children watching him through a fence. Happy to be appreciated again, he makes a makeshift clown suit and begins to regularly perform. His audience grows, but a new prison Commandant orders Helmut to stop. When he refuses and continues to perform, he's beaten and thrown in solitary confinement. But the Nazis soon come up with a use for Helmut, keeping the children quiet as they are loaded into a boxcar to be sent to another camp. Helmut complies, but is accidentally locked in with the children and arrives the next day at Auschwitz

After his girl leaves him for someone else, Herbert gets really depressed and starts searching for a job. He finally finds one in a big house which is inhabited by many, many women. Can he live in the same home with all these females?

飞机失事了，一位原本该一炮而红的喜剧演员陨落了。不过，不打紧，瞧！这不是还有一个小房门可以抓来训练充当一下替身？
路易再一次以门房角色现身，但这不是一个化身博士的故事，而是一个潜能开发课程。究竟这个一如往常会搞砸所有事情的年轻人能够顺利代替往生的艺人在「一炮而红」（the Patsy）节目上大放光彩吗？
影片依旧用色大胆，声音处理也依然令人兴奋（当然，路易的高反差嗓门同样要教观众忍受…），更甚者，片中安排了两场哑剧段落，肯定让路易迷大呼过瘾。不过即使它依然精彩，但对于路易的电影接受度，仍然只有「leave it or take it」…「the choice is yours」。
BTW，曾饰演《M》（可诅咒的人）的Peter Lorre即使外型上已经很难辨识了，但他一开口说话～天啊，我们脑海里又会自动描绘那幅墙上黑影与拿气球的小女孩…

When beautiful Carla Purty joins the university faculty, genetic professor Dr. Sherman Klump grows desperate to whittle his 400-pound frame down to size and win her heart. So, with one swig of his experimental fat-reducing serum, Sherman becomes 'Buddy Love', a fast-talking, pumped-up, plumped down Don Juan.

A timid, nearsighted chemistry teacher discovers a magical potion that can transform him into a suave and handsome Romeo. The Jekyll and Hyde game works well enough until the concoction starts to wear off at the most embarrassing times.