航空署观测到一颗未知行星，正以极高速度向地球撞来。为拯救地球，以杰克（Robert Horton 罗伯特•霍顿 饰）为首的特遣队登陆小行星，希图将其炸毁。队员们成功抵达，却在小行星上发现许多具生命特征的绿色不明物。限于总部的命令，特遣队未作深究，将行星炸毁，不期竟将绿色生物带回伽马3号空间站　　外星生物在空间站内大量繁殖，人类用镭射枪进行攻击，反使其吸收能量得到更快繁殖，在太空站内进行大肆破坏...

　　A group of diverse individuals are suddenly taken from their homes and flown via helicopter to a futuristic bomb shelter in the desert, one-third of a mile below the surface of the Earth. There, the...

　　A group of diverse individuals are suddenly taken from their homes and flown via helicopter to a futuristic bomb shelter in the desert, one-third of a mile below the surface of the Earth. There, the...