The eminent astrophysicist, Professor Lindstrom, has proof that aliens have landed on Earth and are planning on taking it over. He also believes the aliens are plotting to kill him. The trouble is, neither his doctor nor his son take him seriously, not even after the plane he was supposed to be in blows up in mid-air. One man believes him: David Vincent. David meets with the professor, but only after a phony preacher and a fake chauffeur fail to prevent the meeting. Meanwhile, the son suffers from debilitating headaches that have no normal cause. Written by
Did You Know?
Vincent's friend at the CIA is named Jack Ryan. See more
David Vincent writhes in pain during the Invaders' brainwashing attempt, but the alien's screen showing an x-ray shot of Vincent's skull is motionless. See more
Lloyd, I understand betraying me, but why your father? Why?
My father was an enemy. What happened to him was necessary, was all necessary. What are you afraid of? They're not going to execute you. They're just going to change your brain patterns, impose their will on yours, that's all.