Jerry Lewis is Kreton, a childish alien who, against his teacher's will leaves his planet to visit the Earth, and lands in the backyard of a famous television journalist who doesn't believe in U.F.O's and aliens. Wanting to study humans but not able to fully understand them, Kreton makes a mess out of it, generating a lot of comic situations. 　　译文(3): 杰瑞·刘易斯（Jerry Lewis）是克雷顿（Kreton），一个幼稚的外星人，他违背老师的意愿，离开自己的星球访问地球，降落在一位著名电视记者的后院，这位记者不相信美国联邦调查局（U.F.O）和外星人。克雷顿想研究人类，但又不能完全理解人类，于是把它搞得一团糟，产生了许多滑稽的情景。