Space expert Professor Quatermass returns in this sci-fi thriller through the depths of the unknown! During a routine drive to his observatory, Professor Quatermass (Brian Donlevy) stumbles upon a mysterious government facility surrounded by guards and mines. Curious of this unusual site, Quatermass begins to investigate and discovers a remarkably large number of meteors in the area. As his investigation comes to a turning point, Quatermass comes to a horrific conclusion: alien invaders. The ensuing danger couple mean the end of human civilization! In an attempt to save the country and ultimatley the world from intruders, Quatermass must face the terrible dangers ahead and the disasters that follow them.