Research chemist Barnaby Fulton works on a fountain of youth pill for a chemical company. One of the labs chimps gets loose in the laboratory and mixes chemicals, but then pours the mix into the water cooler. When trying one of his own samples, washed down with water from the cooler, Fulton begins to act just like a twenty-year-old and believes his potion is working. Soon his wife and boss are also behaving like children.

Quincy Adams Wagstaff, the new president of Huxley U, hires bumblers Baravelli and Pinky to help his school win the big football game against rival Darwin U.

Four stowaways get mixed up with gangsters while running riot on an ocean liner.

Phillipe, the son of an ambassador in London, idolizes Baines, his father's butler, a kind of hero in the eyes of the child, whose perception changes when he accidentally discovers the secret that Baines keeps and witnesses the consequences that adults' lies can cause.

The Marx Brothers are employed at a hotel in postwar Casablanca, where a ring of Nazis is trying to recover a cache of stolen treasure.

Jeff Wilson, the owner of a small circus, owes his partner Carter $10,000. Before Jeff can pay, Carter's accomplices steal the money so he can take over the circus. Antonio Pirelli and Punchy, who work at the circus, together with lawyer Loophole try to find the thief and get the money back.

The story of a family embroiled in the "White Terror," the Kuomintang government's anti-communist political repression that was wrought on the Taiwanese people from 1947-1987.

Broke Gordon Miller tries to land a backer for his new play while he has to deal with with the hotel manager trying to evict him and his cast.

The incredible but true story of how an impersonator was recruited to impersonate General Montgomery to mislead the Germans about his intentions before the North Africa campaign.

Several people volunteer for a scientific experiment about mind-reading and memory, but the experiment goes horribly wrong.

In the 1810s, an old maid poses as her own niece in order to teach her onetime beau a lesson.

When a young boy's family is killed by the mob, their tough neighbor Gloria becomes his reluctant guardian. In possession of a book that the gangsters want, the pair go on the run in New York.

Is there love after death? After he dies suddenly, the hapless advertising executive Daniel Miller finds himself in Judgment City, a gleaming way station where the newly deceased must prove they lived a life of sufficient courage to advance in their journey through the universe. As the self-doubting Daniel struggles to make his case, a budding relationship with the uninhibited Julia offers him a chance to finally feel alive.

Longfellow Deeds lives in a small town, leading a small town kind of life. When a relative dies and leaves Deeds a fortune, Longfellow moves to the big city where he becomes an instant target for everyone. Deeds outwits them all until Babe Bennett comes along. When small-town boy meets big-city girl anything can, and does, happen.

The Marx Brothers take on high society and the opera world to bring two lovers together. A sly business manager and two wacky friends of two opera singers help them achieve success while humiliating their stuffy and snobbish enemies.

A hurricane swells outside, but it's nothing compared to the storm within the hotel at Key Largo. There, sadistic mobster Johnny Rocco holes up - and holds at gunpoint hotel owner James Temple, his widowed daughter-in-law Nora, and ex-GI Frank McCloud.

Rufus T. Firefly is named president/dictator of bankrupt Freedonia and declares war on neighboring Sylvania over the love of wealthy Mrs. Teasdale.

A film projectionist longs to be a detective, and puts his meagre skills to work when he is framed by a rival for stealing his girlfriend's father's pocketwatch.

A small group of scientists and soldiers take refuge in an underground missile silo where they struggle to control the flesh-eating dead that walks the Earth above.

A writer stumbles upon a long-hidden secret when he agrees to help former British Prime Minister Adam Lang complete his memoirs on a remote island after the politician's assistant drowns in a mysterious accident.