Quatre jeunes ouvriers lassés de leurs conditions décident de devenir gangsters. Jean-Pierre, le leader de la bande les prévient que ce métier ne s'improvise pas et qu'il faut donc l'apprendre. Ils créent donc ensemble la première école de gangstérisme où ils seront à la fois élèves et instructeurs. Martine, une jeune femme sourde et muette, peintre de trottoir se joindra au groupe. L'entrainement va comprendre une mise en condition physique (plus d'alcool ni te tabac) une endurance au souffle et aux coups, la pratique des sports de combats, le maniement des armes, l'apprentissage du poker, etc. Ils se font la main en commettant des "petits coups" puis montent en puissance avec des vols qui font la une des journaux. Ils essuient aussi quelques échecs, comme la tentative de kidnapping du chien d'une prostituée ou l'intimidation d'une bande rivale. Leur dernier coup, l'enlèvement contre rançon d'une vedette de cinéma tourne mal, l'un des membres de la bande paniquant en apercevant un policier sur le lieu de l'échange et mitraillant plusieurs personnes. Désorientés les quatre hommes se réfugient dans une ancienne carrière et se demandent comment gérer la suite des événements et finissent par s’entre-tuer, seule survivra Martine qui retournera dessiner sur les trottoirs.
A Soviet spy (Perkins) is on an official mission to obtain sensitive information from NATO about military mobilization. The klutzy intelligence operative has to rely on the instinct of his new partner and love-interest Penelope Lightfeather (Bardot) as they traipse across the countryside, avoiding counter intelligence agents and distrustful communist operatives.
The beautiful and shy Valentin, all the women fall in love, has much to do between his insatiable mistress, Claudia, the jealous husband of it, Freddy, his selfish and immature mother, alcoholic neighbor, Jane, the concierge Antonia, the three neighboring youth 5th Floor, Noor, Florence and especially Elodie, and a mysterious young Chinese tiger lilies, held in slavery in the house opposite.
Detective Allen Gamble is a mild-mannered forensic accountant. Hot-tempered detective Terry 'Yankee Clipper' Hoitz is partnered with Allen ever since he mistakenly shot Derek Jeter during the World Series. Allen and Terry receive no respect from the other officers, particularly detectives Martin and Fosse. All but Terry idolize cocky detectives Chris Danson and P.K. Highsmith, who are considered the city's best policemen even though they frequently cause millions of dollars in property damage catching petty criminals. During a pursuit, Danson and Highsmith leap to their deaths after misjudging their ability to survive a fall, which causes the precinct to wonder why they did it and who will take their place.
Jacques Massoulier is murdered while hunting at the same place as Julien Vercel (Jean-Louis Trintignant), an estate agent who knew him and whose fingerprints are found on Massoulier's car. As the police discover that Marie-Christine Vercel (Caroline Sihol), Julien's wife, was Massoulier's mistress, Julien is the prime suspect. But his secretary, Barbara Becker (Fanny Ardant), while not quite convinced he is innocent, defends him and leads her private investigations.
Against her wealthy industrialist father Albert's wishes, young Virginie (Brigitte Bardot) marries dentist Hervé Dandieu (Henri Vidal). After three months, all passion has disappeared, and after an argument, Hervé leaves the house for a drink at a club. There, he is seduced by Anita Florès (Dawn Addams), a red-headed dance instructor. Unbeknownst to him, Anita is a scam artist who has sent her boyfriend Léon (Serge Gainsbourg) to photograph her in companionship with Hervé. Although Hervé eventually decides to stay faithful to his wife, Léon is able to take some pictures of their intimate moments.
In the mysterious metropolis of Rain City, a former policeman, Hawk, is out of prison after serving eight years on a murder rap. He returns to his former hangout, Wanda's Cafe, run by his former love, Wanda.
Daniel Foray (Gérard Depardieu) is the leader of an unusual group of burglars in Paris. When Daniel is instructed by his boss to go to Chicago to pull off an easy home robbery it seems simple enough. However, when the group arrives in Chicago, the mission quickly turns into a fiasco.
Dans le somptueux manoir de la famille Federie, l'infirmière Sarah Keate prête main-forte au lieutenant Lance O'Leary afin de démasquer le meurtrier du patient dont elle avait la charge.
Frank Drebin (Leslie Nielsen) has retired from Police Squad and lives a basically happy life with his wife, Jane Spencer-Drebin (Priscilla Presley). It remains "basically happy" because police work has been Frank's meaning of life, and he feels unhappy about not being able to legally take on criminals anymore. Additionally, Jane tries to push him into siring a child, but Frank does not have the courage to go through this yet. It comes as a blessing to him when his old friends Ed Hocken (George Kennedy) and Nordberg (O.J. Simpson) come by and ask for his help in an investigation. The Police Squad has caught wind that a well-known bomber named Rocco Dillon (Fred Ward), who is currently incarcerated, has been hired by a terrorist (Papshmir, known from the first movie) to conduct a major terrorist act against the United States. An important contact, Tanya Peters (Anna Nicole Smith), Rocco's girlfriend, proves to be a dead end, so Drebin is asked to join Dillon undercover in prison, befriend him, and then leak details of the plan to his colleagues. However, the first part of the mission – by pure accident – proves to be extremely taxing; Jane becomes frustrated both at Frank's sudden unwillingness to engage in his marital duties and the suspicion that he is doing police work again, and storms out of the house.
In Los Angeles, Officer Nordberg attempts to bust a heroin drug operation at the docks organized by Vincent Ludwig, and is shot by Ludwig's henchmen. After being briefed on the case by his boss, Captain Ed Hocken, Police Squad Lieutenant Frank Drebin visits Nordberg in the hospital. Nordberg provides cryptic clues, including a picture of Ludwig's ship on which the deal had been organized. Frank meets with police scientist Ted Olsen, who has invented a cufflink that shoots a tranquilizer dart. Frank learns through Ted that Nordberg's jacket tested positive for heroin. Police Squad is in charge of security for the visit of Queen Elizabeth II to Los Angeles, and Ed tells Frank that he has 24 hours to clear Nordberg before word gets out about what happened and detracts from the queen's visit. Frank visits Ludwig in his office. Ludwig learns that Nordberg is still alive. Ludwig has his assistant, Jane Spencer, assist Frank in his investigation and the two fall in love. Jane is unaware of her employer's illegal activities.
Frank Drebin (Leslie Nielsen) is honored at the White House, where President George H. W. Bush (John Roarke) announces that he will base his recommendation for the country's energy program on Dr. Albert Meinheimer's (Richard Griffiths) advice at the National Press Club dinner the following week. The heads of the coal and oil (fossil fuel) and nuclear industries are apparently distressed by this fact, as Dr. Meinheimer is an advocate for renewable energy. Jane Spencer (Priscilla Presley), now working for Dr. Meinheimer, is working late at his research institute, crying about Frank. She spots a man in a red van. A maintenance worker, emptying out garbage cans, discovers a clock with dynamite attached and takes it to the security guards, accidentally triggering it. The next morning, Frank reacquaints himself with Jane as he interviews her about the explosion. He is shown around the institute and meets Jane's boyfriend, Hexagon Oil executive Quentin Hapsburg (Robert Goulet), of whom he becomes exceedingly jealous. Frank's boss, Ed Hocken (George Kennedy), finds him at a lonely blues bar. Meanwhile, at a meeting of the "energy" industry leaders, Hapsburg reveals that he has kidnapped Dr. Meinheimer and found an exact double for him, Earl Hacker, who will give their recommendation to the President endorsing fossil and nuclear fuels.