After a nuclear war, the people of the planet Davanna developed an incurable blood disease. One of its citizens is sent to Earth to examine the blood of the humans for its usefulness in curing Davanna's dying race. The intruder (Paul Birch) has adopted the name Mr. Johnson, conspicuous only for his oversensitive ears and his sunglasses, which he wears even in the dark. The sunglasses hide his blank, white-eyed stare which kills his victims by burning through their eyes and into their brains.
Johnson hires nurse Nadine (Beverly Garland) to look after him in his house. Her boss, Dr. Rochelle (William Roerick), is under Johnson's hypnotic control after finding out about his patient's peculiar blood cell structure. Johnson's plans are disturbed by the unexpected and sudden appearance of a woman from Davanna. She asks him for an immediate transfusion, because her physical condition is rapidly deteriorating. Johnson then breaks into Rochelle's office, but by accident he steals blood contaminated by Rabies. Later, the Davanna woman collapses in the street, dying at a hospital. Nadine's friend, police patrolman Harry Sherbourne (Morgan Jones), tries to question Dr. Rochelle about the dead woman, but he is unable to speak while under Johnson's mind control. As a precaution, now fearing discovery, Johnson kills Rochelle, but Nadine, also in danger, manages to call the police. Johnson then flees in his car, followed in close pursuit by patrolman Sherbourne on his motorcycle. When Sherbourne runs his siren, Johnson, suddenly distracted by the loud sound, drives his car off the road and dies in a crash.
After Johnson's burial, Sherbourne and Nadine stand by his grave, which bears the inscription "Here lies a man who was not of this Earth". While Sherbourne expresses mild compassion for Johnson, whose driving force was the rescue of his planet and its dying populace, Nadine refuses to offer any kind of pity. They leave, but soon a mysterious man appears at the grave site. [Note 1] Like Johnson, he wears the same sunglasses and carries the same distinctive case containing transfusion equipment.
whose friend police patrolman Harry Sherbourne?
Nadine's friend