A rogue scientist near a small desert town arouses the suspicion of the town's doctor when his lab assistant is found dead from a case of acromegaly, which took only four days to develop. As the doctor investigates, aided by the scientist's new female assistant, they discover that something is devouring local cattle and humans in incr...

During a space voyage, four scientists are altered by cosmic rays: Reed Richards gains the ability to stretch his body; Sue Storm can become invisible; Johnny Storm controls fire; and Ben Grimm is turned into a super-strong … thing. Together, these "Fantastic Four" must now thwart the evil plans of Dr. Doom and save the world from cert...

When virtually all of the residents of Piedmont, New Mexico are found dead after the return to Earth of a space satellite, the head of the US Air Force's Project Scoop declares an emergency. A group of eminent scientists led by Dr. Jeremy Stone scrambles to a secure laboratory and tries first to isolate the life form while determining ...

A spaceship is sent to Mars after an alien distress signal is picked up. They find one survivor, but when a crew member is found drained of blood it's evident they have rescued a bloodsucking monster. (Uses footage from Encounter in Space (1963).)

A US government germ warfare lab has had an accident. The first theory is that one of the germs has been released and killed several scientists. The big fear is that a more virulent strain, named The Satan Bug because all life can be killed off by it should it escape, may have been stolen.