基克爾（弗雷德里克·馬奇 Fredric March 飾）是一名知識非常淵博的科學家，他將畢生的經歷都投注到了探索人性的善惡奧妙之中，并且最終制造出了一種可怕的藥劑，這種藥劑能夠令基克爾化身成為海德先生，基克爾將自己所有的惡意和壞念頭都投射到了海德的大腦里。白天，基克爾行醫救人樂善好施，待到夜幕降臨，海德先生便會現身，殺人害命，無惡不作。基克爾有一位名叫伊芙（米利亞姆·霍普金斯 Miriam Hopkins 飾）的未婚妻，兩人之間的感情非常的要好，然而，海德先生的存在讓基克爾不自覺的被名叫碧翠絲（Eric Wilton 飾）的放蕩妓女所吸引。分裂的人格讓基克爾感到萬分的痛苦，他想要消滅海德先生。

　　Joe is an Alien on Earth. At least that is what his father told him before he died when Joe was eleven. He finds it difficult to adjust, and to find a compatible girl friend

　　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...

　　科技業億萬富翁邁爾斯·布朗（愛德華·諾頓 飾）邀了幾位感情深厚的摯友到他的希臘私人小島渡假，不料卻有人命喪于此！這座世外桃源原來并不如想像中美好。命案既出，大偵探布蘭科（丹尼爾·克雷格飾）此時不出馬更待何時？且看他如何解開重重謎團！