Peter Sellers stars as Harold Fine, a self-described square--a 35-year-old Los Angeles Lawyer who is not looking forward to middle age and his upcoming wedding. His life changes, however, when he falls in love with Nancy, a free-spirited, innocent, and beautiful young hippie. After Harold and his family enjoy some of her "groovy" brownies, he decides to "drop out" with her and become a hippie too. But can he return to his old life when he discovers that the hippie lifestyle is just a little too independent and irresponsible for his tastes?

A gang planning a 'job' find themselves living with a little old lady, who thinks they are musicians. When the gang set out to kill Mrs Wilberforce, they run into one problem after another, and they get what they deserve.

As a child, Princess Dala is given, by her father, the largest diamond in the world, in which if you stare into it can be seen a "Pink Panther" hence the name. However, now as a young woman, rebels in her home country have seized power and are demanding the return of the jewel. Dala relaxes on holiday in an exclusive skiing resort but noted British playboy, Sir Charles Lytton is in town. He is secretly "The Phantom" - infamous jewel thief who has eyes on the Pink Panther. Charles's playboy nephew George follows to the resort in an attempt to steal it and blame it on "The Phantom", not knowing that it's his uncle. On the Phantom's trail is Inspector Jacques Clouseau, from France, and his wife who, unknowingly to Jacques, is the lover of Charles and helper in the Phantom's crime. Jacques tries to stop the attempts but he is so clueless that when several attempts are made at a fantasy-dress party...

A simple-minded gardener named Chance has spent all his life in the Washington D.C. house of an old man. When the man dies, Chance is put out on the street with no knowledge of the world except what he has learned from television. After a run in with a limousine, he ends up a guest of a woman (Eve) and her husband Ben, an influential but sickly businessman. Now called Chauncey Gardner, Chance becomes friend and confidante to Ben, and an unlikely political insider.

When rich M. Ballon's spanish driver is found shot dead, Inspector Jacques Clouseau is the first official on the scene. All evidence suggests Maria Gambrelli, the maid, to be the murderer. But Clouseau, being attracted to the beautiful girl, is convinced that she is hiding something. So, he has her released from jail and tries to follow her secretly. Things do not work out the way the inspector wanted and people keep being murdered, and each time innocent Maria seems to be the killer. But with someone important wanting Clouseau and nobody else to cover this case, his tolerance-challenged boss Charles Dreyfuss is close to losing his mind when casualties keep turning up. And Clouseau keeps on causing trouble without knowing it...

The crooks in London know how it works. No one carries guns and no one resists the police. Then a new gang appears that go one better...