剧情描写一家研究DNA遗传工程的药厂测验测验室将小精灵加以测验测验，成果制作了一群破损力剧烈的怪物，将大楼搞得人仰马翻，男女主角费尽九牛二虎之力才把这群怪物祛除。

三年后，科学家韦恩·斯萨林斯基（里克·莫拉尼斯Rick Moranis饰）一家人搬到内华达州的滨海社区，继续他的电磁份子研究。三年前，他已经因为操作不妥把孩子们的身段“缩小”了，闹出了持续串哭笑不得的故事。而此次，糊涂韦恩仍然重蹈覆辙，大摆乌龙。在一次测验测验进程傍边，只有两岁的小儿子亚当，居然被“变大”了。小亚当只有一打仗电流，…

一场在极圈举行的原子弹爆炸测验测验，开释了冰层中沈睡一亿四千年的恐龙，这只恐龙跑到纽约市大举侵犯，形成重大发急。

When FBI Agent Zack Stewart is killed, Agent John Ripley takes over the three cases he was working on, hoping one will lead to his killer. The first involves gangster Joe Walpo and Ripley finds his hideout through Joe's girl friend, Connie Anderson. Joe is killed but it is established he was 400 miles away when Stewart…

Scientists and American Air Force officials fend off a blood-thirsty alien organism while at a remote arctic outpost