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　　The boisterous, arrogant professor Challenger, a reputed biologist and anthropologist, dares the London Zoological Society to mount an expedition to verify his spectacular claim, without physical proof, that his previous expedition to the Amazonian basin found live dinosaurs. Apart from him and his 'socialite' counterpart, professor Summerlee, it consists of experienced discoverer Lord Roxbury, the young reporter Ed Malone -who got publicly struck down with Challenger's umbrella at his arrival- and Jennifer Holmes, Malone's news agency's boss's daughter, essentially as conditions for putting up the money. In Brazil they are joined by Jennifer's brother David and local 'guide' Manuel Gomez. They soon discover the dinosaurs are real and dangerous, like giant spiders, but loose their helicopter and thus are desperate for a way down from the isolated plateau. They learn Roxbury knew about the fate of Burton White, an explorer whose diary they find, thus presume to be dead, in search of diamonds, and confirmation of the local tribe being the lethal guardians of the plateau's secrets, but also get surprising help...

　　富顿教授（加里·格兰特 Cary Grant 饰）是一位科学家，正在研究一种能够让人返老还童的神奇药物。某一天，富顿用来试验药物的黑猩猩从笼子里逃了出来，在实验室里“大闹天宫”，没想到竟然在误打误撞之下将富顿一直想要研制但始终没有成功的神药给捣鼓了出来。　　对此一无所知的富顿在偶然间喝下了这种药物，很快，药效便发挥了作用，富顿一反常态，言行举止俨然一幅二十岁小伙子的模样。秘书路易斯（玛丽莲·梦露 Marilyn Monroe 饰）前来拜访富顿教授，没想到却被他邀请去游泳、溜冰。之后，富顿的妻子爱德华（金格尔·罗杰斯 Ginger Rogers 饰）亦误食了药物，一连串让人忍俊不禁的趣事就此展开。

 玛利亚（朱丽·安德鲁斯  饰）是一个年轻活泼的修女，喜欢在大自然下高声歌唱，所以她常常忘记了修道院里的规矩。院长认为玛利亚并不属于规矩严格的修道院。院长与众嬷嬷商量后，决定安排玛利亚到一位名叫特拉普（克里斯托弗·普卢默 饰）上校家当家庭教师。上校的妻子去世多年，留下7个孩子，他要求对孩子严格管教。他告诉玛利亚在他家的家庭教师都做不长久，都是因为孩子的恶作剧。玛利亚果然也遭到了恶作剧，可是这位善良的老师并没有告诉他们的父亲，而是像个母亲一样照顾孩子，很快跟孩子打成一片。上校也渐渐在玛利亚的引导下改变了对孩子们的态度。上校与玛利亚之间发生了感情，他们完婚后回到了已被纳粹占领的奥地利，上校并不想为纳粹办事，一家人准备逃跑……

　　侠盗“一枝花”专劫富济贫故为人钦佩，却因正义感得罪了一名蛇蝎美人，该女子名叫“仇女”虽嫁与一土豪“孤寒财主”为妾但始终不忘被“一枝花”所辱，誓必要将“一枝花”置于死地。“一枝花”浪迹江湖，但“仇女”并未因而放过他，反而更诬造许多盗窃案令官方大举追缉之。其时江湖上出现两个小人物，一肥一瘦，肥名“胀爆”为人憨直，因仰慕“一枝花”而喜扮大侠，瘦名“扭纹柴”常自作聪明经常撞板，喜占小便宜，为了官方之花红到处找寻“一枝花”，而偶遇上“胀爆”后来反成莫逆之交，两人更结伴一同寻找“一枝花”……