Not of This Earth (1957) Plot Summary Explained

The alien from Davanna needs human blood because his planet has been devastated by a nuclear-induced blood disease that is killing his entire race. Human blood serves as a potential cure for this disease, which is why he was sent to Earth to study and harvest it.

• alien blood
• davanna disease
• blood cure
• nuclear disease
• race extinction

Johnson communicates with Davanna through a hidden device located behind a sliding panel in his Griffith Park mansion. This device allows him to maintain contact with his home planet while operating on Earth.

• communication device
• griffith park mansion
• hidden panel
• davanna contact
• alien technology

Johnson kills Jeremy because the loyal bodyguard discovers evidence of Johnson's alien origin. Since Jeremy poses a threat to keeping the alien's true nature secret, Johnson eliminates him to prevent exposure.

• jeremy death
• bodyguard killed
• alien exposed
• evidence discovery
• murder

Dr. Rochelle becomes a target after she discovers unusual characteristics in the alien's blood cell structure during examination. Recognizing her as a potential threat who could reveal his nature, Johnson deploys an umbrella-like creature to kill her.

• dr rochelle
• blood discovery
• umbrella creature
• attack
• alien threat

Johnson uses hypnotic mind control to subdue people who get too close to discovering his secrets. He places Dr. Rochelle under his influence to prevent her from revealing what she learned about his blood, and later uses this ability to silence Patrolman Sherbourne's investigation.

• hypnosis
• mind control
• silencing
• investigation blocked
• alien powers

Johnson steals blood for transfusion that is contaminated with rabies. When the Davanna woman receives this contaminated blood, it proves fatal and she dies at the hospital, causing his plan to unravel and drawing more attention to his activities.

• rabies
• blood contamination
• transfusion death
• davanna woman
• fatal mistake

The oxygen-activated umbrella creature is a bizarre weapon Johnson deploys to eliminate Dr. Rochelle after she discovers his blood secrets. This strange device demonstrates the alien's willingness to use exotic technology to protect his mission on Earth.

• umbrella creature
• weapon
• oxygen activated
• device
• attack weapon

Nadine escapes and calls the police for help. Patrolman Sherbourne pursues Johnson through the city and arrives on a motorcycle. When Sherbourne turns on his siren, it causes Johnson to lose control of his car, resulting in a crash that kills the alien.

• car crash
• police pursuit
• sherbourne
• siren
• nadine escape
• death

After Johnson's burial, a mysterious man wearing sunglasses and carrying the same transfusion case approaches the grave. This suggests that another alien from Davanna has arrived on Earth, implying the threat is not over and Johnson's mission may be continued by others.

Foreshadowing: The inscription on Johnson's grave reads 'Here lies a man who was not of This Earth', foreshadowing the continued alien presence.

• ending
• sequel tease
• new alien
• sunglasses
• transfusion case
• grave

Johnson hires Nadine to look after him in his mansion, providing cover for his activities and allowing him to operate unobstructed while maintaining a normal appearance. She becomes entangled in his strange routine without initially suspecting his true nature.

• nadine hired
• nurse
• mansION
• cover
• alien disguise

With a transfusion limit in place restricting how much blood he can obtain legally, Johnson resorts to murder to harvest more blood. He targets various people including a teenage girl, a Chinese-American man, a vacuum-cleaner salesman, and homeless individuals to collect enough blood for his mission.

• transfusion limit
• murder
• blood harvest
• victims
• killing spree