John Longden

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.

After killing a man in self-defense, a woman is caught between telling the truth to her police inspector boyfriend or being blackmailed by a witness.