William Franklyn

Professor Quatermass investigates an area of much meteoric activity and discovers that a government research station is instead a headquarters for gaseous aliens from outer space. Their mission is to invade the bodies of British citizens and government officials, and conquer Earth. Only the courage and scientific skills of the Professor can save the planet.

El inspector Murray, que investiga una serie de muertes extrañas en Londres, llega a la conclusión de que se trata de un caso de vampirismo.