The investigation into four men under alien mind enslavement and the purpose behind their relentless creation of a spaceship continues as handicapped children are gathered.
An investigator seeks four ex-soldiers, each shot in the head with bullets fashioned from a meteorite, who heal, develop genius minds and relentlessly carry out an alien mission.
A scientist hires a miner to be the human subject in an experiment to speed-up evolution, which slowly turns the miner into a highly intelligent, alien-like being.
The inhabitants of a typical suburban street find that they've been abducted by a diseased alien race, which wants to discover if humans will make suitable slaves for them.